ok, let me give you guys the run down on the difference between p2p and torrent sites.
p2p are the best way to get caught, because that is what your average internet user knows how to use - because any retard could do it. plus, p2p networks are far more 'mainstream' than torrent sites.
secondly, any respectable torrent site makes everyone maintain a ratio of downloaded to uploaded data. if they don't maintain it, they get kicked off and banned. if someone uploads shit, it gets reported and removed (unlike p2p networks where shit just spreads)
so, if someone needs to upload just as much as they download, how could the RIAA and MPAA stay on to catch people? they would have to be actively downloading or uploading to 'catch' a person, but then they too would be breaking the law.
plus, bots get sniffed out pretty quickly on any respectable torrent site.