I'm not sure there are many people out there that will take the time to hunt down each other in game over arguments started in the forums. If it were personal information then yes, maybe it would be a valid argument but we are talking about anonymity over already existing anonymity. Also, these are official forums with (as far as I know) development and moderation by paid employees. In order to curb the cost of herding cats and sprained vaginas they place accountability on the community. To be honest I'll take that if it means I don't have to put up with as many dumb threads and posts.