And anon posting allows people to shake out the bugs in Gnutella, the total picture of Gnutella, the "community", including the politics and "personal" problems.
I have presented some of the more tough subjects that "registered" users wouldn't touch for fear of looking "stupid" or saving face. Whistle blowing is a good example too, when some client is doing bad things to the network.
It can get annoying at times, but it's worth it, and that's why we have moderators who can edit/delete.
I just wish they would delete a little less, and when being directly "challenged", leave the editing up to a different moderator who is not emotionally invloved.
Even moderators need to be kept in check now and then.