Well, Dean - if you're not registered, or you're working from a computer that doesn't have your registration "cookie," your name is not automatically entered in the "from" box - and it never enters automatically if yours is the first message posted. I find that in cases where my name isn't entered automatically, I have a hard time remembering to enter it. So, I think that the anonymous posters simply forgot to post their names. Thinking that way gives me a much more kindly attitude toward their anonymity.
Besides, it makes me feel smugly superior.....
-Joe Offer-