Neil Gaiman lists part of the original Comics Code
1) No comic magazine shall use the ord “horror” or “terror” in its title.
2) All scenes of horror, excessive bloodshed, gory or gruesome crimes, depravity, lust, sadism, masochism shall not be permitted.
3) All lurid, unsavory, gruesome illustrations shall be eliminated.
4) Inclusion of stories dealing with evil shall be used or or shall be published only where the intent is to illustrate a moral issue and in no case shall evil be presented alluringly nor so as to injure the sensibilities of the reader.
5) Scenes dealing with, or instruments associated with walking dead, torture vampires and vampirism, ghouls, cannibalism, and werewolfism are prohibited.
Cripes. That’s everything on my shelf. (Except for Bone, which would probably be banned for the title alone. Top 10 (thanks to ***Dave and Randy for showing me that) is probably the funniest, most light-hearted romp I’ve read in years, except for the pedophilia rings, blatant racism (from a lead character, even), difficult questions about alternate lifestyles, alien porn death conspiracies, my favorite character getting killed by drug-addled power-mad leaders-of-the-people.