Half the banned people are here. Under different screen names. Hiding.
Which is fine. Since they are hiding, their behavior is modified which is all I wanted in the first place.
The only ones I work really hard at keeping off the site are the people who have ripped other members off in the past. The others, if they are persistent, I leave on the site, and just make a note of who they are..
There are about 1/2 dozen "banned" people who have second accounts that I'm aware of. I just keep a close watch on them.