|Because of gun restrictions, teachers were not allowed to have guns in schools.|
We will find if that is an issue now as Arkansas teachers are allowed to carry guns now.
Looney Tunes has been linked to violent behavior in children so that kind of blows your argument of 'animated' and 'outright fiction' out of the water. I remember the Simpsons came under fire for the Itchy and Scratchy skit too. Even Power Rangers, Star Wars, and Spider-man came under fire for an increase in violent behavior in children.
You are right about one thing, they don't know what ultimately makes a person turn into a killer. The only thing they know is that violence in the media (movies, games, etc) do desensitize kids and cause aggression to increase. They theorize abuse does it, or bullying, but I don't know as I played violent video games, love violent movies, had my father murdered, was bullied throughout school, had access to guns, and never even considered killing anyone. I did have an aggression problem (temper), but I just grew up and decided nothing is worth getting mad over.
The thing I worry about, as I stated before, is what congress perceives as fact. I pull some comfort from the fact that the Supreme Court ruled video games are Freedom of Speech, but violence and sex aren't forms of speech (though the things you may scream will doing it certainly are). There in is where my problem lies. Congress could pass laws that limit or remove violence in movies and games and do away with sex outside of the XXX industry. Imagine if Halo didn't have shooting, just multiple choice talking to bring peace between the species, though that would probably had been more fun considering ;).