If you are using BitTorrent or a similar P2P file sharing program, you should probably be using PeerGuardian2 to help protect yourself against the RIAA and other anti-P2P organizations. PeerGuardian2 keeps a blacklist of sites that it will not allow connections with, these blacklisted sites being sites known to be anti-P2P organizations that are looking to entrap you. It's obviously not perfect since it's only as good as the list, but it's an extra layer of precaution that is well worth taking. The only down-side is that it does not work on Vista yet, but they claim to be working on it, so check back often.