as the article says you need a lot more research. Multiple areas, multiple racial backgrounds, multiple cultural backgrounds and thousands of participants to get a solid journal for all the MDs to read over and what not.
Personally i'm not surprised. Humanity has far too many possibilities so of course you people will start an uproar about stuff like columbine and then start banning video games. Because of all those possibilities you will have isolated events like this happening, but look on a broader scale and even if you have 12year olds playing GTA or MW2 and Halo they aren't going outside and shooting people. Personally after a certain age things just clicked for me and i do notice that video games aren't reality and there is a difference.
more on topic though. I play video games to relieve stress frequently. If i'm hardcore programming and stuck on dealing with some function or something and i can't figure it out i usually just crash and playing something mega simply like minecraft or something