Peer-to-peer (P2P) file sharing has traditionally operated on a narrow ledge between perceptions of legality and illegality. The legitimacy of underlying file-transfer technology is never in dispute, though media companies might hate the unleashing of content that it represents. The narrow ledge is balanced between two activities: directly infringing copyright (what some users do), and indirectly facilitating infringement by providing a platform that makes it easy (what P2P platforms do). One purpose of the Digital Millennium Copyright Act (DMCA) is to protect the technology of file sharing, and companies that use it, by inventing a theo
