be very careful if you start playing with torrents.
there are lots and lots and lots of illegal ones out there.
there are lots of nasty idiots who infect torrents with viruses, trojans and the like.
make sure you have very good up-to-date anti-virus/spyware software. SCAN EVERYTHING!
many isps limit torrent usage at peak hours.
realise that uploading torrents slows down your internet speed.
(PS how do you do warning boxes?)