I read a lot about stupid laws, however some of them are hard to believe. So, I'll only mentioned the ones that are really laws and hope other people will contribute to this thread as well.
I'll start with the laws of the country I live in.
In Dubai it's against the law to:
1) Live with your partner (girlfriend/boyfriend)
2) Be drunk in public even though you can go to a nightclub and get hammered. However, if you leave the club and decide to walk for a while on the street you'll be in jail.
3) Kiss in public.
4) Wear a thong at the beach.
For all the above "crimes" people get arrested, pay fine and the deported.
In Saudi Arabia women are not allowed to:
1) Drive a car
2) Walk alone on the street