On bandflesh and anonymity in fandom by wistfuljane. It makes an interesting argument about the reasons for anonymity and the pitfalls.
If you as a community of bandfleshers are willing to allow things to be said without facing retributions then you must, I think, be able to accept things said against your community without punishing those who said them.
On the other side:
re:bandflesh by impertinence. This one is pro-anonymous and I like her explanation of the attraction and why it works for her:
Have you ever posted something, went to bed, woken up and thought OH SHIT WHY DID I DO THAT D: but known it was too late to stop people remembering you as "that chick who posted that opinion I REALLY HATE"? Yeah, me too. But on bandflesh, no matter how dumb you are, there's always the chance for forgiveness, because you're anon. People's grudges might last into forever, but they're not grudges against you and don't color further interaction.
I think wistfujane comes closest to my feelings; it can't be a one-way street. The problem isn't wanting somewhere to post that's anonymous; stripping away individual identity is freeing as hell and allows people to say what they don't feel they can say otherwise, or that they feel they will be reviled for, or heck, as impertinence states above. That's why anonymous memes are so popular.
But, at least for me, giving up individuality to a group does, in fact, mean you take responsibility for asshattery that happens in the group. That's part of the trade you make for that freedom.
ETA: The Place With the Thing by quettaser. I liked this one too. Also in defense of anonymous comm, etc.