According to documents released to the New York Times and The Guardian, the NSA has added gamers to their watch list. Xbox Live, World of Warcraft, and Second Life have all been under surveillence, but both Microsoft and Blizzard claim no involvement.

Source: http://www.gamespot.com/articles/government-infiltrates-xbox-live-and-world-of-warcraft-in-search-of-terrorists/1100-6416610/