By whom? Remember, we're talking decentralized. In Gnutella and the like there is no authority. So if you want to take the Pirate Bay approach of providing a

By whom? Remember, we're talking decentralized. In Gnutella and the like there is no authority. So if you want to take the Pirate Bay approach of providing a small authoritative list of "trusted moderators" through the web and have all the users use that filter, you have to keep it simple so that it can be easily replicated if the web-component gets taken down. Complicating the web/authority component means mirroring it and resurrecting it becomes hard.