Parents should stop looking at TV and video games as the problem, and start looking at themselves. I'm a sophomore in high school, and I watch many violent movies, and play violent video games. I don't go out and kill people, in fact, I don't even fight. I think it is the parents responsibility to raise their children correctly. All movies come with ratings.
All video games come with ratings.
Now they look for someone to blame. If they had have taught their kid the difference between right and wrong, this never would have happened. I just think that the media should consider the way their art may effect the lives of others. In fact, they do that all the time when it comes to studying the way commercials get people to spend their money. If they can spare no expense in finding ways to separate you from your money - they could spend a couple bucks try to find ways to influence emotional vulnerable people to resolve their problems peacefully.