Metaphors for MP3s

On the fight for free media we could claim deep emotional stress caused by the music industry and the music ditributors by FORCING music into our ears and then caussing DEEP EMOTIONAL STRESS trying to forget or take out our head the song. But we are not allowed acces to it and therefore the stress continues, and then we are charged so much just to hear it and to relieve our emotional anguish.

Im not very good explaining this in legal terms, but I would put it as an institution that infects populations and then charges millions for the cure. Music can be infectious.