The hacker who roasted 50,000 computers with his variant of the Blaster worm was recently sentenced to one and a half years in prison for his actions. His punishment could have been much more severe, but the judge thought the hacker's parents were partially to blame for allowing the hacker to lock himself in his room and "create his own reality" through the Internet.
This raises an interesting issue. In the past, there have been several unsuccessful attempts to sue video game companies for real-world violence which was allegedly caused by kids playing violent video games. It shouldn't be long before someone tries suing the kids' parents instead.