The Pirate Bay has always made it clear that they don't obey takedown requests from content owners. That doesn't stop Hollywood from going after the Pirate Bay's users, however, and they do so on a large scale. The Pirate Bay is well aware of these pirate tracking outfits, and does what it can to give them a hard time. Reporting fake peers is one of the tricks they use.

Most often, companies such as BayTSP and MediaSentry are hired to connect to BitTorrent trackers, and send takedown notices to the users (via their ISP) who download movies, TV-shows or music albums of a company they represent. This is a fairly easy process, since BitTorrent is far from anonymous: Every user necessarily broadcasts his or her IP-address to other peers in the swarm.

Sometimes anti-piracy outfits use their own trackers to gather evidence. Last week we reported that The Pirate Bay started to actively remove these suspicious trackers from their torrents, with some help from torrenteditor.com. Running a tracker is not required though, to collect information from BitTorrent users. In fact, many attempt to use publicly available trackers such as The Pirate Bay to do so. However, the tracker owners are aware of this, and trick these tracking companies by polluting the list of IP-addresses the tracker returns. That is one of the techniques The Pirate Bay uses, just to show how flawed the evidence gathering is.

Polluting the evidence works like this. When a client asks for a list of peers who are downloading the same torrent, the tracker software automatically inserts several “random IP addresses” that are not in the swarm. They are based on existing sub-nets, but might be from people who may not even be aware that BitTorrent exists. This means that the evidence that’s being gathered by anti-piracy companies includes IPs that belong to people that were not downloading the movie or album they are accused of. Perfect deniability, as the people who coded the tracker software explain.

Of course, this doesn’t work when the pirate-tracking company requires itself to connect to the peer, before the IP-address is collected, since it is impossible to connect to a non-existing peer. A representative from BayTSP told TorrentFreak that they have such a requirement, but several others are less thorough, which makes their claims useless, and impossible to defend in court.

The best solution is of course to ban these anti-piracy companies from using the tracker in the first place. This is something The Pirate Bay is working on as well, and they have blocked many IP-ranges already, but it’s impossible to ban them all. Unlike most of the suits in Hollywood, the companies that go after illicit file-sharers are experts in their field, and know more about BitTorrent than many users. They try to circumvent blocklists such as PeerGuardian whenever possible, and change IPs when they are marked.

Pirate Bay co-founder TiAMO told TorrentFreak that he has several criteria on which he can pick out the suspicious users that might be collecting IP-addresses. He also said that he’s working on a automated warning system which will operate as a sniffer on a monitor port. That project is far from complete, but has the potential to detect suspicious behavior more easily.

Nevertheless, it is impossible (as the name might give away) to keep the prying eyes of Hollywood off public trackers. Even private trackers are far from secure, as most anti-piracy companies have accounts at the larger communities. The private in “private tracker” merely refers to the fact that you have to login, and has nothing to do with “security”. The Pirate Bay (and other tracker owners) take several measures to prevent their users from being tracked by anti-piracy outfits, but there’s only so much they can do.