There are entire books written filled with silly, outdated, or absurd laws and regulations (both federal and state).
Here's just a taste[1]:
> 18 USC §1382 & 32 CFR §636.28(g)(iv) make it a federal crime to ride a moped into Fort Stewart without wearing long trousers.
> 16 USC §551 & 36 CFR §261.16(c) make it a crime to wash a fish at a faucet if it's not a fish-washing faucet, in a national forest.
> 21 USC §461 & 9 CFR §381.171(d) make it a crime to sell "Turkey Ham" as "Ham Turkey" or with the words "Turkey" and "Ham" in different fonts
> 18 USC §1865 & 36 CFR §7.96(b)(3) make it a federal crime to harass a golfer in any national park in Washington, DC.
[1] http://www.freedomworks.org/content/19-ridiculous-federal-cr...