Woodsman, I wasn't trying to steal your thunder, honest! I even remember reading that post (now).
My thought was more along the line of a single post, maybe locked to all but site admin, with a list of names like Carl noted in the Bruis thread.
Dynoflow
Bowers
Bruis
Listed alphabetically, or chronologically or even by number of complaints. Wouldn't stop humans from their regular scam posts but maybe when complaints on a seller or buyer hit a certain number they would make the list.
Getting on the list should be somewhat difficult but getting off the list should be even harder.
Murff