I've heard you should use an IP mask thingie, like Peer Guardian while you're running torrent programs. It's a bit of a pain, in that it can be overly sensitive and block a lot of internet sites that you're trying to access as well, but supposedly the Evol Hollywood People keep an eye out on who's downloading and so on, and so this helps block that sort of thing.

However, I do know that with it installed, I have to have port forwarding setup - at least on a wireless router, anyway. And that is a pain and a half to do.