Anti-Pirates Caught Spying on Thousands of Torrents 14 years ago
"To put the spying activity in perspective, the BitTorrent activity of these two anti-piracy companies is three times greater than that generated by all customers of a smaller ISP such as Sonic.net. It is comparable to the BitTorrent activity of all Comcast Business clients combined."
You can protect yourself from spying (as it is an invasion of privacy) with a VPN.
http://torrentfreak.com/which-vpn-providers-really-take-anon...