A bill under consideration in the US Congress would make operators of media-swap networks such as Kazaa and Grokster liable for users’ actions. “Opponents say the language is so broad it could apply to makers of MP3 players, such as iPod, and CD and DVD recorders, as well as to media organizations that give consumers tips on using digital content. The recording and movie industries support the bill to help curb piracy. But the tech industry is worried.”