The thing to keep in mind with getting viruses is that the only way to get them is through the files you download. Viruses can't invade your computer just by leaving bittorrent or Azureus on. The virus had to have been in something you downloaded. Seeing as we know where all the files are coming from (BP members), the chances of one of us putting a virus within a video file are slim to none. Malicious torrents don't exist very long because trackers (as the name suggests) can track which users post up which files. If they are malicious then the files will be removed from the tracker and that user will be banned.
As far as questions of legality - this area is a quagmire of differing opinions that I'm just not willing to get into at the moment. Check out
www.accvideos.com and the disclaimer they have. The main thing to keep in mind is this: BP is not hosting these files anywhere on the server. They don't physically exist on any server for that matter (not even the tracker). The files are being transmitted only from user to user. With that being said, I would think that Clarity and/or Mili would probably want links for only game videos to be put up on this forum. Live music and other legit download links should probably be put elsewhere.