When I first watched Heath Ledger in Dark kNight, I thought it was the most violent and psychopathic movie ever. Nolan tried to make the movie feel real. In doing so, he made the killing of innocent civilians of Gotham in the movie realistic and plausible by an insane mad man Joker.
In Dark Knight, the Joker kills innocent people in hospitals, on boats, in buildings, and just about everywhere. Ledger was a great actor, but the Joker character was just disgustingly warped, like he had no ounce of humanity and was obsessed with killing as many innocent people as possible for no reason, other than to kill people.
It was just a sickening movie, and I can easily see how a mentally unstable person can watch the film repeatedly and get a feeling that humans are the worthless bodies shown in the movie. Its just a traumatic movie. In seeing the previews for the 3rd batman movie, the callous death of football players in the stadium is just sickening. I just get a really violent vibe from the films, and it glorifies mass murder.
The villain isn't the one that's glorified, the hero who stops him is. Just because something happens in a movie, a television show, a book, or any other form of media, doesn't mean it's being glorified. Oy.