Gnutella isn't exactly anonymous, but it takes the heat off the select few that distribute pirated software, now that 50 people are sharing it, it's hard to know where it started, who started it, and if anyone comes hunting you down, simply say you were searching for something like information on'adobe' and you didn't know you accidentally downloaded Photoshop, which is automatically shared (of course). It's not illegial to use Gnutella, so if you don't admit to intentionally doing it (and remove any files they specifically complain about) you don't have a thing to worry about.