It's quite a simple game, all you need to do is label the above user in just a few words (let's say from two to ten words) whilst still giving a simple and direct meaning as to what you think about the user's place on the forums. Make it witty if you'd like, but don't make it outright inflammatory. (Labelling somebody as a giant richard wouldn't really fit the bill.)
For example:
"IkeTheGeneric - Resident Post Whore" ✓
sorry ike
"Plaz - Alt Account Dispenser" ✓
you freakin' earned that title plaz
"Badspot - Creator of the game" ✓
which is pretty much fact
John Doe - Giant starfish X
no don't do this
Begin!