@yukushi: I disagree. This one incident caused by a bunch of terrorists doesn't prove anything. Online games are great. There are downsides but there are also downsides to be isolated in your game and only able to play it when someone is sat next to you. Not everyone including me has the capacity or friends to invite over. That ended when I left school. People now have jobs and families they can't come around to my house for a few hours and play games. Being able to jump into each other's game over the internet is one of the advantages of the modern world.
Saying it is a bad thing just because it sometimes goes wrong is like saying that there is no point giving people heart valve replacements or prosthetic hips because they need replacing every ten years. Just totally and utterly beside the point of having it in the first place.