I prefer anonymity. Google knows too much about me already, I'd prefer they stop trying to make every fact about me known by the servers that serve me pages. I don't want every link on the internet an opportunity for the authorities to stop that click event.
I have a lot of people in my G+ circles. I've never met 99% of them before G+. As far as I'm concerned John Smith is as anonymous to me as Sp00n B4nder, neither one has any context for me except what I read from them.
And yet, I interact "socially" with them just fine, and I think of them as John Smith and Sp00n B4nder. It causes me zero problems.
Names in this context are just labels, and I don't care what the labels say, I just care what they point to.
Simply drawing social graphs by itself is hugely informative.
That said, a federated system in which I could present numerous identities of varying levels of persistence and/or repudiability could be of some interest.
As mentioned in jwz's post http://en.wikipedia.org/wiki/Federalist_Papers makes a very interesting reference. You could kick around a very interesting model based on the method of publication. On the other hand, most people here really don't know who each other are except via the words written under a username.
