I'm sure many of you have heard your parents mention you shouldn't be playing such violent games, and this leads to desensitization. I'm going to tell you, that is a load.

The reason that people go out and shoot thier classmates is because of lack of parental guidance. It isn't because of thier choice of TV or video games.

Albeit, they do contribute, but proper parental guidance (hence the warnings on the mature stuff!) means they are there to dispell things, and in the case of games like GTA, mention that it is wrong.