on books...
How many copies of books written about serial killers or other extreme crimes have been sold, or documentaries on TV? They could be taken as someone expressing an unnatural interest in these things, and using the same warped view as those who say gamers are automatically socially unacceptable; you could also argue that their interest in extreme crimes more than a little disturbing...
The popularity of horror films of people being cut up like the Saw films, again very disturbing if that's how you get your kicks, and that's to humans; not imagined orcs and monsters.
Almost everything can be twisted any way you like if you look long enough.
