As the Gnutella network is completely decentralized (except for a large number of Gnutella host caches) there is noone who can be made responsible for its existence and any copyright issues, and the network cannot be disabled due to its decentralized nature. As trap_jaw stated, it's some of the users who violate copyright laws, not Gnutella itself. But well, that was the same with Napster. Not Napster itself was breaking copyright laws, nevertheless Napster was made responsible, because of the centralized server and because breaking copyright laws was "encouraged".