I agree with Pogue in this piece about a Code of Conduct proposed by Tim O'Reilly. Comments should be identified with the person making them. Anonymity, in most cases, should not be the standard when posting online.
"...There's room for argument over some of his points -- true to form, most bloggers' first reaction was to criticize it -- but one point, I think, is unassailable:
"3. Consider eliminating anonymous comments."
That's it, baby. People don't go to psychotic extremes when their names or e-mail addresses are visible."