Over at MO, it's been asserted that one of the success stories in getting the site to work well is strenuous effort by the moderators to get people to use their real names when posting. I'm sympathetic to this viewpoint, especially since I've seen a lot of vitriol get thrown around in theory blogs by anonymous users. 

This is not something we can enforce, but it could be an FAQ item strongly encouraging the use of real names, as well as a mandate for moderators to lean on people.