I wrote a long defense of nyms just now, and I realized about halfway through it that I had completely skipped over the problem of spamonyms.
So let me say one thing in defense of a real names policy — if Google could couple it with a real effort to cut down on spamonyms (those fake accounts that are used pollute the internet with spam) I’d be more sympathetic.
I don’t think that’s what this is about though, or where it’s going.