Ok, this is something I probably should have laid out in my intro.
One of my pet peeves is anonymous commenting. Now I want non-registered users to be able to comment, but I request that if they do so they leave their name. I feel the anonymous commenting - particularly when the comment attacks the author or another commentator - is cowardly. Therefore, if I see an anonymous comment on my blog I will delete it regardless of content.
This is my blog and I make the rules. If you don't like it, start your own blog and I will respect your rules there.