It doesn't bother me seeing a banned member in the stats. Call me an 'ol softy, but I still feel kind of sorry for him.
Hate to see anyone get themselves into a neg. rep. fix and end up banned unless they are truly gross or creepy sounding, which wasn't the case with him.
I imagine his account would disappear after so many months of inactivity, and username would automatically disappear from the stats at the same time. Just guessing though....
~Pramrider