Courts have wisely shown a reluctance to ban technology that appears to threaten an entrenched industry. Movie studios lost a fight to ban Sony's Betamax VCR, thinking bootleg copies would destroy Hollywood. (Now home videos of movies are a huge source of studio income.) Advances in audio copying and even the MP3 technology used by Napster were all allowed over initial industry worries via court rulings or settlements. The music industry will need an overwhelming case to show that Napster is only about piracy -- and not as defenders claim, occasional music sharing and convenience.