Just for the record. Not ALL torrents are illegal. Only ones used for pirating software and media.
The Torrent PROTOCOL method was originally created to allow quick distribution of legal content. Colleges, Steam, Blizzard, even Amazon use the torrent protocol for software distribution.
Saying Torrents are illegal is like saying that FTP, HTTP, email, and newsgroups are illegal.
However, just like anything else worthwhile in the world, many people abuse the torrent protocol and use it for illegal purposes.
I thought this needed to be cleared up since someone else posted that they were illegal and then the thread was closed preventing any correction.