I have disabled anonymous comments on this blog. Unfortunately, I am having to reject about one spam comment a day which post using anonymous identities. Even before the spammers came here, my experience has been that anonymous posters usually post something stupid or a flame; I just looked through my archive and have gotten about one useful anonymous comment in my three years of running this blog.
So, no more anonymous comments. If you want to comment here, get a Google or OpenID.