Tinfoil Hat Time
This has not been a good week for internet rights and privacy. First, the infamous but fortunately revoked changes to Facebook's TOS, then Tumblr deleted five "anonyblogger" accounts that had been used to insult other users, leaving many users concerned about censorship on the platform. The latest cause for concern is a rumor regarding Last.fm possibly providing user details to the RIAA that would reveal which individuals had listened to unreleased tracks.
This is largely viewed to be an untrue rumor at the moment, but it is a disconcerting possibility.