Since we brought up personas, I think it's worth asking another question about how we want to handle the membership roster.
I use a specific screenname for most forums, but MyArmoury and ARMA make you use your full (first and last) real name, so I did the same here and on all arms & armor forums I'm on for consistency (and so I can remember my login). I don't mind my full name being used, but of course, James Anderson is probably only slightly less common than John Smith. As mentioned, Facebook uses full names, but I think a key difference is that those profiles (and all info on them) can be set to private/friends only.
I'd prefer my professional "persona" to be the first thing they saw, rather than a pic of me armoured up and brandishing a sword
I had to interview someone at work for a position. Young guy. I walked into the room, shook his hand and said "Hello, I'm James". And his reply? "Hey, you're the ninja guy!". I stuttered something incoherent and sat in shock the rest of the interview. We spent some time after that interview, figuring out how the guy found out to say that. Turned out that if you google my employer's name, then my myspace page I had at the time came up, as I had them listed as an employer, and there were only about 25 employees at the time. And I had my "ninja" picture as my profile image at the time.
Thankfully, we didn't find out until after he had left from the interview, and wasn't hired ... his myspace page. We googled his name to see what came up after my "adventure". A MySpace Band page that he is a member of. No big deal. Oh, except that there was a picture of all the members completely naked, with strategically placed instruments covering questionable bits of flesh. Might have been more, but one was enough, and that window couldn't be closed fast enough.
At that point, the ninja thing didn't seem too weird any more....