SALON has a rather critical article on anonymous bloggers like Atrios and MWO. (Is MWO a blog? I guess.)

I understand anonymous blogging — and pseudonymous blogging — and I don’t think that they’re necessarily illegitimate. But it’s certainly true that I tend to take stuff from named bloggers more seriously. With a sufficient track record, that can change, of course. It does seem, though, that anonymity often affects the tone of a blog. Posting under your real name probably does encourage a certain additional degree of civility, in most people at least.