The blogo-sphere, which could be a new, revolutionary public space, instead becomes a stale, claustrophobic environment, appealing chiefly to a certain kind of aggressive, point-scoring male - and utterly off-putting to everyone else. My immediate hunch is that the anonymity of the web is the problem. People do not tend to call each other Nazis in public meetings, or on radio phone-ins, because other people would know who they were.