On SurvivorSucks, there’s a frequent poster named I am leaving this board forever. 
What a great username!
There are other boards?
Jesus was in a coma.
There for a minute Lib I got my hopes up, but then I remembered what the thread was about. 
One that made me chuckle was a poster who went by the SN of inoneearandoutyourmother.
A friend of mine posts under the name wench of the gods on another messageboard - I hope she leaves me her screen-name when she dies.
I know a Not A Normal Girl - we usually call her NANG, which we determined is the sound you get when you hit the pole of a swingset.
StG
Bertram Pantyshield
On a Tolkien messageboard - Coconut Ent.
On a theatre board, there’s ** The Very Angry Man With No Name And A Large Collection of Tapes **. Which has spawned some similar ones.
On another board, there’s someone called Goddamn Newbie Scum. It’s going to look awkward when he has 500 posts to his name.