Speaking as the proverbail 'Old Man' of the AB, when it started, people generally used their own names - I did b ecause in the past, a team of writers wrote features on their section, and put their by-line on each one, so it made sense to answer questions as 'ourselves. Now that the site is 'stand alone', I;ve just carried on using my own name.
I don;t know of anyone who knows me, but if they do, fine, i always stand by what I ask and answer ... 'cos that's the kinda guy I am!