From the site:
The Pirate Bay"The Pirate Bay is the worlds largest bittorrent tracker. Bittorrent is a filesharing protocol that in a reliable way enables big and fast file transfers.
This is an open tracker, where anyone can download torrent files. To be able to upload torrent files, write comments and personal messages one must register at the site. This is of course free.
The members at The Pirate Bay represents a broad spectrum of file sharers. Therefore material that seem offensive might be available. Do not contact us if there is anything you find offensive, instead focus on the material that you find positive. The Pirate Bay only removes torrents if the name isn't in accordance with the content. One must know what is being downloaded."