The Blizzard Terms of Service note that this will happen following a request from law enforcement. 17.C Blizzard may, with or without notice to you, disclose y

The Blizzard Terms of Service note that this will happen following a request from law enforcement. 17.C Blizzard may, with or without notice to you, disclose your Internet Protocol (IP) address(es), personal information, Chat logs, and other information about you and your activities: (a) in response to a request by law enforcement, a court order or other legal process; or (b) if Blizzard believes that doing so may protect your safety or the safety of others. If one chooses to play the game, after having agreed to have their records turned over in such a case, it seems like less of a moral issue. Another reason why people should consider actually reading their terms of service before agreeing.