The Null Device
Rumours are abounding that last.fm, a music-based social networking website which voluntarily collects music-listening data from users, has been voluntarily handing data concerning unreleased albums to the RIAA, allowing their search-and-seizure SWAT teams to track down the criminals listening to unreleased U2 albums. Well, some anonymous tipster says that some guy who works for CBS (the Big Copyright corporation which owns last.fm) told them that this is the case, whereas last.fm and various last.fm people (including co-founder and executive Richard Jones) have emphatically denied this. (Which, of course, they could be expected to, as if this turned out to be true, the bad PR would effectively kill last.fm as it currently is (as a social networking site for those passionate about music).)
Of course, even if this isn't true, it could happen; it could be one directive from head office or bad "war on piracy" law away. As such, if you're listening to anything you could be prosecuted for the possession of, turn off your last.fm scrobbler. Or set it to a different account with the identity of the CEO of the RIAA or something. (Hypothetically speaking, of course; The Null Device does not condone identity theft, or, for that matter, listening to U2.)
I wonder how long until some hacktivist writes a bot that is fed with the track listings of unreleased recordings and, when run by a user, automatically reports to last.fm that the tracks had been listened to as an act of anonymous protest. After all, they can't raid everyone, can they; and the existence of such a bot would make the "evidence" useless for prosecution or search warrants.