Some of the weirdest US laws still on the books are completely real and carry actual penalties, while a surprising share of the odd statutes passed around online cannot be traced to any statute at all. Wisconsin really does regulate the color of your margarine. Mobile really does ban Silly String during Mardi Gras. But the Ohio law about getting a fish drunk? Nobody has ever produced the citation. The split between verified and folklore matters, because one group can get you fined and the other just makes for a good story at dinner.
State and Local Laws That Are Genuinely Enforceable
Wisconsin’s oleomargarine statute prohibits restaurants from serving colored margarine as a substitute for butter unless the customer specifically asks for it. A first violation carries a fine between $100 and $500, up to three months in jail, or both. Repeat offenders face $500 to $1,000 in fines and six months to a year behind bars. The law was built to shield the state’s dairy industry and remains in effect as of 2026, updated through Wisconsin Act 137.1Wisconsin State Legislature. Wisconsin Code 97.18 – Oleomargarine Regulations
Mobile, Alabama, bans possession of Silly String during Mardi Gras. The city warns that aerosol string products are illegal during the festivities and that possession can result in arrest. The reason is practical: the residue is expensive to remove from historic buildings and can damage paint and fabric. The ban is actively communicated and at least nominally enforced during parade season.
Carmel-by-the-Sea, California, has a 1963 ordinance banning shoes with spiked heels taller than two inches and a base smaller than one square inch, unless the wearer gets a permit from the city. The law was passed to limit the city’s liability on its cobblestone streets. No citation has been issued under it in at least 40 years, and the city has never repealed it.
Gainesville, Georgia, passed an ordinance in 1961 declaring fried chicken a “delicacy” that must be eaten with your hands. It was a publicity stunt to promote the city’s identity as a poultry capital. When a visitor was “arrested” for using a fork in 2009, the whole thing was staged and the mayor issued a pardon. The ordinance remains on the books as local novelty.
Federal Rules That Sound Invented
Possessing a Bird Feather
Under the Migratory Bird Treaty Act, it is illegal to possess any migratory bird, or any part of one, including feathers, nests, and eggs, without a federal permit. The statute makes no exception for feathers you find on the ground, molted feathers, or feathers from birds killed by windows or cars.2Office of the Law Revision Counsel. 16 USC 703 – Taking, Killing, or Possessing Migratory Birds Unlawful A violation is a federal misdemeanor punishable by up to $15,000 in fines, six months in prison, or both. Knowingly taking a protected bird with intent to sell bumps the charge to a felony with up to $2,000 in fines and two years in prison.3Office of the Law Revision Counsel. 16 USC 707 – Violations and Penalties
In practice, the U.S. Fish and Wildlife Service does not typically prosecute a hiker who pockets a feather, but the law is broad enough that it could. Exceptions exist for members of federally recognized tribes who use feathers for cultural and religious purposes, and for institutions with research or educational permits. Non-native species like peacocks and European starlings are not covered.
Insect Parts in Food
The FDA publishes a Food Defect Levels Handbook setting the maximum natural contamination allowed before a food is considered adulterated. Chocolate can contain up to 60 insect fragments per 100 grams. Peanut butter is allowed up to 30 insect fragments per 100 grams and one rodent hair per 100 grams. Canned tomatoes can carry up to 10 fly eggs per 500 grams before the FDA acts.4Food and Drug Administration. Food Defect Levels Handbook
These are action levels, not averages. Most products fall far below the thresholds. The FDA sets them because growing, harvesting, and processing food that is completely free of natural defects is not realistically achievable, and the alternative of heavier pesticide use carries its own problems.
Raw Milk Across State Lines
Since 1987, federal regulation has required that all milk and milk products shipped in interstate commerce for human consumption be pasteurized. That makes it a federal violation to sell raw milk across state lines, even if both the origin and destination states allow raw milk sales internally.5eCFR. 21 CFR 1240.61 – Mandatory Pasteurization for All Milk and Milk Products in Final Package Form for Direct Human Consumption The rule came from the FDA using its authority under the Federal Food, Drug, and Cosmetic Act and the Public Health Service Act, not from Congress directly.
Old Moral and Religious Statutes That Were Never Repealed
Adultery as a Crime
Adultery remains a criminal offense in at least 16 states. Three of them classify it as a felony: Michigan, Oklahoma, and Wisconsin. In Michigan, the felony classification can theoretically intersect with criminal sexual conduct statutes in ways that produce severe penalties. Prosecutions are extraordinarily rare everywhere, but the laws have never been formally repealed. About a dozen other states treat adultery as a misdemeanor, and a handful more have statutes whose status is ambiguous because they were never explicitly decriminalized.
Blue Laws
Blue laws, originally meant to enforce Sunday religious observance by restricting commerce, persist in various forms. South Carolina still prohibits the sale of beer and wine between midnight Saturday and sunrise Monday, with limited exceptions for certain liquor licenses and for wines produced entirely within the state. Violating the restriction is a misdemeanor punishable by up to $100 in fines or 30 days in jail, plus automatic revocation of the seller’s license. Similar Sunday restrictions on alcohol, car sales, or hunting exist across multiple states, with the specifics varying widely.
Anti-Mask Laws
At least 23 states and the District of Columbia have laws restricting face coverings in public, most of them originally enacted to combat Ku Klux Klan intimidation. They typically apply when someone wears a mask while committing or intending to commit a crime, or with intent to intimidate another person or deprive them of their rights. Nearly all include exceptions for traditional holiday costumes, theatrical performances, employment-related protective gear, emergency gas masks, and religious coverings. During the COVID-19 pandemic, courts generally upheld public health mask mandates as distinct from the anti-intimidation purpose of the older statutes.
Weird Laws That Are Probably Myths
A lot of the most-repeated “weird laws” online collapse under scrutiny. If a listicle gives no statute citation, be skeptical.
The claim that Ohio law prohibits getting a fish drunk is one of the most widely circulated. The section usually cited, Ohio Revised Code 1533.67, actually covers enforcement procedures for wildlife officers and says nothing about alcohol or fish. No other section of the code appears to contain this prohibition either.
Alabama’s supposed ban on wearing a fake mustache in church if it causes laughter is another favorite. Despite showing up on countless lists, no one has identified a specific Alabama statute or local ordinance containing the prohibition. One Alabama news outlet described it as “almost impossible to actually prove the origin of such crazy laws.”
The Arizona rule forbidding donkeys from sleeping in bathtubs is usually traced to a 1924 incident in Kingman where a donkey in a washtub was swept away by flooding. The story is colorful, but the ordinance itself has never been pinned to a verifiable code section. It belongs to legal folklore: possibly rooted in a real event, but not something you could find in a current municipal code.
The pattern repeats. A fun anecdote with no traceable statute. That does not mean every unusual law is fake. It does mean that if someone cannot tell you the specific code section, the claim deserves suspicion.
Newer Laws That Sound Just as Strange
Faking a Service Animal
More than half of U.S. states now criminalize fraudulently representing a pet as a service animal. Under the ADA, a service animal is a dog individually trained to perform tasks for a person with a disability, which excludes emotional support animals that provide comfort without specific task training. Violations are typically charged as misdemeanors. Penalties include fines, community service for organizations serving people with disabilities, and escalating consequences for repeat offenses. Alabama requires 100 hours of community service for a first offense; Florida mandates 30. These laws exist because the ADA limits what businesses can ask about a service animal, which creates an opening for fraud that legislatures have tried to close.
Sign and Aesthetic Rules
Many municipalities regulate the appearance of private property through aesthetic ordinances that can feel surprisingly controlling, covering everything from the color you paint your house to the size, material, and lighting of signs. The Supreme Court set some limits in 2015, ruling that sign ordinances regulating content (treating political signs differently from directional signs, for example) must survive strict scrutiny. Content-neutral regulations covering size, placement, materials, and lighting remain permissible. That is the legal framework behind strict rules about yard signs.
Why Outdated Laws Stay on the Books
Repealing a law takes the same legislative process as passing one: committee hearings, floor votes, a governor’s signature. Legislators have limited time and no political reward for removing a donkey-bathtub ordinance. The result is what legal scholars call legislative inertia: outdated laws survive not because anyone supports them, but because no one has a reason to spend resources removing them.
Some of these laws also serve a residual purpose. Wisconsin’s margarine statute looks absurd until you consider that dairy is still the state’s largest agricultural sector. Mobile’s Silly String ban sounds petty until you see the cleanup bill after Mardi Gras. The target is unusual; the underlying concern about property damage or economic protection is not.
If You Are Actually Charged Under One
Being prosecuted under a law nobody has enforced in decades is unlikely, but a few doctrines offer potential defenses if it happens. The most direct is desuetude, the principle that a law can become unenforceable through prolonged non-enforcement. American courts have been reluctant to embrace it fully, but it has some footing: in a 1992 case, West Virginia’s highest court recognized desuetude as a valid defense. The doctrine does not apply to the U.S. Constitution itself.
A second route is a selective enforcement challenge under the Equal Protection Clause. If you can show you were singled out while others engaged in the same conduct without consequence, and that the selection was motivated by bad faith or discriminatory intent, a court may dismiss the case. Proving this is extremely difficult. Courts extend a presumption of regularity to prosecutors, meaning judges assume enforcement decisions are made in good faith absent clear evidence of targeting based on race, religion, or the exercise of constitutional rights.
Some old laws are also vulnerable to a void-for-vagueness challenge. If a statute is so unclear that an ordinary person cannot determine what conduct it prohibits or what penalty applies, courts can strike it. This works best when the law uses archaic language that no longer carries a clear meaning, or when it delegates so much discretion to enforcement officers that it invites arbitrary prosecution. Criminal statutes face a particularly high bar.
None of these defenses is a guaranteed winner, and hiring a lawyer to fight a novelty charge costs real money regardless of outcome. The most reliable protection is the same one that has worked for decades: prosecutors have bigger problems than margarine color and high heels, and they know it.