How Not To Get Sued by the RIAA
The bottom line on this article is to not share files on your PC that have copyrights. If everyone decids to stop sharing, then there will be nothing to download.
What we need is to be able to have restricted sharing among a close circle of friends and family. That mimics the historical (and fair use) way we have shared music, and will keep the members of RIAA in plenty of dough.