Slashdot | Answers From Lawyers Who Defend Against RIAA Suits: "What should we do to prevent needing your services? Another way of putting this is, how do we avoid getting sued by the RIAA?
All of the cases that I have seen stem from people who are using a Fast Track sharing program such as Kazaa, Imesh, Gnutella, LimeWire, etc., having a shared files folder with copyrighted songs in it, even if the song files were obtained legally. So even making sure to pay for all of your downloads wouldn't protect you from a lawsuit. The only way I know to avoid the present litigation wave is to avoid having shared files of copyrighted songs."