UTW - for a lot of the people currently attending anonymity is no longer an issue. Personally I've shared beer, flying time, and beds (only sleeping, of course!) with most of 'em.
IMO losing your anonymity makes posting your own opinions easier. You know the people who will read it, and you know that however they respond you'll probably end up having a laugh about it over a beer the next time you meet. Blindly arguing over some petty issue, not knowing whether the other person is taking the p1ss or not, makes things tricky!