It's well known in the US that the RIAA settle out of court all the time, and the amount is around the $3000 mark...
NewsFactor Network | RIAA Music Crackdown Nets College Kids Streamcast to slug it out in court with RIAA, MPAA
Addicus...
The RIAA usually catch you uploading files not downloading them, what they do is trace your IP to your ISP and your ISP then gives them your information and it goes from there...