There's a whole web site for this stuff:
http://www.dumblaws.com
They've got some doozies:
In Alabama, Georgia, South Carolina, Maine, and Massachussetts, all adult males who go to church must bring a rifle in case of Indian attack.
Duels to the death are allowed on Boston Common, but only on Sundays and if the Governor is present.
In Hollywood, you can't drive more than 2,000 sheep down Hollywood Blvd. at any one time.
In Montana and South Dakota, various city (or state) laws determine how many Indians walking down the street are a war party-and can be legally shot.
In California, no vehicle
without a driver may exceed 60 MPH.
Cattle thieves in Temple, Texas may be hung on the spot.
Dallas, Texas is the only major U.S. City still with a film review board: and they can issue a rating higher than what the MPAA issues. (i.e. they can change a PG-13 to an R if they feel like it, for example)
In Blythe, CA, you can't own cowboy boots unless you own at least two cows.
Several towns in various states require those who take showers to have doctor's prescription.
In Los Angeles, both Zoot Suits and licking toads are illegal.