Remember shows like "Rocko's Modern Life" and "Ren and Stimpy" that were suppose to be for kids but turned out to be some of the most controversial cartoons ever?
Cracked.com should give you some articles on them.
I mean seriously, one of the characters does phone sex, in other episodes it is filled with -blam!-[-blam!-] references, lots of violence and sometimes blood, testicle references, etc.
[Edited on 11.29.2012 8:58 PM PST]
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Someone claimed to have seen an old cartoon short pulled from the air. Something creepy, if I remember right. Either way there was a thread made about it that reached the top forum topics on the right hand side and [b][i]supposedly[/i][/b] got some "universities" and other higher-end establishments involved in the search to find this creepy TV short. I believe it turned out to be a big troll attempt but I stopped paying attention after the 4th page or so. [Edited on 11.29.2012 9:13 PM PST]