I was reading my mother's Stephen King collection when I was a kid. She had probably forgotten that Rage was in The Bachman Books. It was written years before I was born and even then my high-school years were before the Columbine / regular school shooting era.
Even King says he is "glad it is out of print", something I just learned today. Odd, as I did not see the anti-hero as particularly inspiring. If I had been slightly more unstable, perhaps I would have thought so. It is amusing that today a kid that reads that book might be considered a deviant and locked up.
Kids that are bullied always think of this scenario, reading about it might actually help rather than hurt. Now, writers will not touch this topic with a ten foot pole, leaving teenagers with less support. Talking is not going to help; try getting teens to talk about any important matters, let alone suicidal ones. Yeah, I am not surprised that it comes to a breaking point of school shootings.
After all these years people will not admit that these thoughts happen and that kids help. Instead we have "blame the victim of bullying", "toughen up", and "kids will be kids." If Stephen Fucking King is afraid to talk about this subject, it is truly hopeless.