Users often discover content through Web-based torrent search engines and indexes that are referred to as “torrent discovery sites.” Both trackers and torrent discovery sites have come under mounting legal pressure from major content owners typically major movie studios and record label companies, who have in the past successfully shut down popular sites such as piratebay, kickass, isohunt, to name a few. BitTorrent users also face surveillance by content owners, who are increasingly making legal threats against individuals, especially in the specific area of motion pictures, musical hits, and popular pornography videos.
In light of potential copyright infringement, there are two vulnerable areas of the BitTorrent protocols to be aware of: the unprotected access of the torrent discovery sites and the use of the torrent trackers. Individual BitTorrent users who desire anonymity for whatever reason, visiting those torrent discovery sites via publicly visible IP address must be avoided since users who rely on centralized torrent discovery sites expose themselves to be relatively easy litigation targets. Besides most downloaders are interested in certain contents available at the present moment, not something which was available years ago and may no longer be present on any of the BitTorrent swarms. So spending a lot of time searching on a torrent discovery site unprotected represents a lot of risks that outweigh potential benefits. Avoiding using the trackers may enhance privacy and make it harder to disrupt through legal threats at the expense of not being able to get the desired contents.
Modern BitTorrent client such as Vuze Azureus addresses both of these issues by helping finding contents without using the discovery sites and without using the trackers to locate available peers.