A while back I heard this funny story about Madonna sabotaging p2p downloads of her songs. Instead of the song that was supposed to be downloaded you got this recording of her saying "What the **** do you think you're doing?"

Anyone ever experience that, or something like it?

I heard about that. I think that was only on Kazaa because of that weak file
verification scheme. Until I switched my young nieces to BearShare they were
getting sabotaged music regularly, mostly the ones with harsh beeps and
squawks and a few that were looped. The same method could be used to insert
messages like that.