If violent video games are the reason this stuff is happening then those around me would have cause to worry.
I've been playing games of that type since I was in Jr. High School over 30 years ago. When I play those games yes it's entertaining and fun however in real life I know the difference between defending my life and those around me and taking lives like these crazed shooters we've been reading about in the news.
That said, I guess it boils down to the comments made by Rep. Jason Chaffetz where the real problem isn't with those who are responsible with guns (such as myself). The problem is with those who are mentally unstable having access to guns. Looking at the last few articles about these shooters I have the feeling they definitely have issues which need addressing still. I agree with Rep Chaffetz that to reduce these issues we need to address how these people are handled.
BTW, I am a gun owner and have a CCP and have additional training in the use of my guns. As a private citizen I felt it was irresponsible for me NOT to have a gun especially since in my lifetime my family has had two incidents where they were in mortal danger and the police were not just around the corner. And since SCOTUS said it isn't the responsibility of the police to safeguard my family but to be a deterrent and clean up the mess that it's my responsibility and only mine to protect my family.
So now we have guns, bullets and training. It's the only way to protect us from becoming the next victim on FOX news.