Last.fm not really sharing data with RIAA
But according to one of Last.fm's founders, commenting on the TechCrunch post, "This is utter nonsense and totally untrue. As far as I can tell, the author of this article got a "tip" from *one* person and decided to make a story out of it. Techcrunch is full of shit, film at 11." I'm not attacking TechCrunch's reporting here, I'm just doing some reporting of my own to make sure everyone knows that this story should apparently be downgraded to rumor status, and there's no need to dump your last.fm account over it.
UPDATE: Despite it being past 1AM at Last.fm's London HQ, the Last.fm staff have posted in their forums: "Of course we work with the major labels and provide them with broad statistics, as we would with any other label, but we'd never personally identify our users to a third party - that goes against everything we stand for. As far as I'm concerned Techcrunch have made this whole story up."