In a recent Pew Internet Project survey, 15% of online adults admitted to downloading or sharing files using peer-to-peer or BitTorrent.30 Globally, estimates from file-sharing research firm Big Champagne place the P2P universe at more than 200 million computers with at least one peer-to-peer application installed, and operators of the popular Pirate Bay torrent tracker have identified more than 25 million “peers” who have used their site alone to exchange files.