kabome writes with this excerpt from a story about an alleged drug dealer who was located by law enforcement thanks to World of Warcraft
"Roberson’s subpoena was nothing more than a politely worded request, considering the limits of his law enforcement jurisdiction and the ambiguity of the online world. 'They don’t have to respond to us, and I was under the assumption that they wouldn’t,' said Roberson. ... Blizzard did more than cooperate. It gave Roberson everything he needed to track down Hightower, including his IP address, his account information and history, his billing address, and even his online screen name and preferred server. From there it was a simple matter to zero in on the suspect's location."