Buy music form indiies instead and if you really insiste on listening to the old foggy brtiney slutt and madona crap stuff use p2p instead. You don’t have to share. The level of sharing is around 70%. To begin to make a dent in availability math calculation indicate that you have to reduce the sharing down to 1-2% so if you don’t feel confortable sharing you don’t have too. if you are reaaly parano use Winny or Ants or use your P2p2 app via the network system TOR.
You can also use fire wall such as peer-Guardian that keep out only the music and entertainement parasites out of your system. Anyway the odd of beeing buly by these craps is less than wining the lotto even if you share and take no precaution.