re: the violence aspect of video games and movies. I wish people would understand that there's likely a vast difference between how a normal, rational, sane person responds to a culture awash in violence, and how a mentally unstable lunatic might respond to it. Since the truly unstable are relatively rare in our society, the chances of the increase in their violent actions showing up in a statistically meaningful way is low.
At the end of the day, I think the mass gun free zone shootings are a combination of a popular culture that glorifies violence, a video game culture that desensitizes the mentally unstable towards violence, and the proliferation of firearms. Yet I would not change our popular culture, tone down video games, or reduce the availability of firearms. Instead, I think the right answer is to get rid of "come shoot me zones." If that makes me crazy like a LaPierre, so be it.