Using VPN's is an easy and safe way to download torrents anonymously, there are many commercial torrent privacy service offerings like TorrentPrivacy and IPREDATOR and free solutions like ItsHidden and BitBlinder.
While world's most well known and censored torrent portal ThePirateBay offers there own paid premium VPN anonymity service IPREDATOR, they recently started promoting (advertising) Privitize free VPN service. Privitize offers full-anonymity across all internet service and do not keep any log for client connections or any type of data snooping, the installer hosted at TPB does have an adware embedded which pays for the free service. However, we have a cleaner version without the adware so our users can enjoy the service without getting the garbage.