Song-swapping service Napster has intentionally adopted an easy-to-defeat filtering system that leaves all of the copyrighted material it has been asked to block available to its users, the recording industry charged in court documents on Tuesday.
Calling Napster’s system “the most porous filter available,” the big music companies asked a U.S. District Court to order the Redwood City, Calif.-based startup to build a more effective filter or limit the music available on its network to approved works.
