Under this person’s name it says “Just another Serlin” instead of “Member”. How did that happen?
Serlin is a banned poster who repeatedly comes back using other names. “Just another Serlin” is the admins way of letting members know in shorthand why a particular screen name has suddenly been banned without apparent reason.
Here’s a thread from last month that has further links to threads that explain it all.
http://boards.straightdope.com/sdmb/showthread.php?threadid=69250
Wow, Jab, you’ve never heard of Serlin?
Gather 'round the fire, m’boy, and I shall tell you a tale…
I remember Serlin. I was just wondering if maybe some hacking poster had done that, not a moderator.
It’s more creative that just saying “BANNED”.
I wanted to ask this, but I didn’t think it warranted starting it’s own thread so I’ll just ask here. Why does the member Ghost have “Boomerang” as his/her status?
I just thought of something… maybe s/he just keeps getting banned but coming back? 
Well, I meant, “You haven’t heard the latest tale of Serlin?” This whole “Just Another Serlin” was the subject of much laughter and merriment a while back.
Hell, it still makes me laugh.
Yep. I’m usually the one who puts non-standard status lines. I get bored sometimes, or ticked off.