^Well, you do now.
I think it has something to do w/ join dates. Look at the User List. People w/ legit post counts all have dates in 2003 or 2006.
I looked at it for a while. It's actually User Number, not join date. All users over no. 400 got it. H2C's "2006" join date was a system fuckup after Smartt's meltdown shut the board.
What the significance of 400 is, I don't have a friggen clue, but it must mean something to whoever done it.