For example, in Columbine everyone pointed fingers at DOOM, but those Eric and Dylan had been socially ostracized for years. While it's true that they had a multitude of drawings of seemingly DOOM inspired weapons and sketches of DOOM-like scenes, I played UT3 a lot and you don't see me sketching people blowing up into little bloody chunks in the margins of my notebooks.
I remember that day. I overheard some of my friends at school talking about it but I didn't think it was real, until I got home and saw the news.
Back on topic, I also remember hearing something on the radio about when Halo 2 came out, there was this guy that called in to the show and said, "It's good that they make games like this, otherwise we'd be out there doing it for real." Now granted, he wasn't a child, but still, not a good thing to say on a live radio show. They were talking about it for the next ~30 minutes.