The Supreme Court has declined to hear an appeal of the federal court ruling that barred the music industry from compelling internet providers to turn over the names and addresses of their subscribers. The decision could throw a major monkey wrench into the industry’s tactic of suing illegal file-traders anonymously, then forcing providers to match the computer footprints with user information. A high court decision on whether it will rehear a separate case concerning the liability of manufacturers in piracy cases has not yet been announced.