Maybe I am telling you too much about myself but here are some of my favorites:

1. Cannot base characters off the Who's drummer Keith Moon.
14. Ogres are not kosher.
17. Collateral Damage Man is not an appropriate name for a super hero.
25. The green elf does not need food badly.
43. No longer allowed to set nazi propaganda music to a snappy disco beat.
47. They do not make Nair in wookie sizes.
67. There is no Kung Fu manuever "McGuire Swings For Bleachers"
105. I am not allowed to polymorph anyone into Abe Vigoda.
144. There is no such thing as pleather armor.
163. Not allowed to try and make a dire version of any dog of the toy breeds.
176. I cannot make called shots to the plectrum, anvil, stirrup, hammer or Isle of Langerhans.
and just to prove I read them all:
299. I do not get any XP for anyone I kill by stampeding sheep.