GameoftheBlog points to the ubiquity of video games and gun violence as seen in this scene from Grindhouse as transcribed by Joel Reed:

Mother: I want you to open that for Mommy. Now, take the gun. Careful! And if anyone comes to the door, that isn't me, I want to to shoot them, okay? I'm not kidding Tony, you shoot them. Just like your video games. You shoot them in the head.

The predictable happens and it has nothing to do with video games. Brian Crecente