MediaDefender offer their services to studios and record labels. Their services are methods of disrupting illegal video sharing, such as uploading bogus torrents and torrents filled with advertising (to attempt to regain lost revenue). Not surprisingly some of their practices have been shouted down by the bittorrent community, but it seems there's traction to some of what the community has complained about. Some interesting reading can be found here, and here... regarding 700mb of internal staff e-mail being leaked to bittorrent. Seems like they're not totally above board. Reminds me a lot of the Sony DRM malware scandal. Especially the part that sounds like they were developing software to turns torrent users computers into autonomous robots that would seek other torrent users. Botnet anyone?