I have seen guys like this. I think you should ban them. They add nothing to your business. My guess is they don't even buy alot of drinks. Although they are predators for unskilled players they are shortstops at best. They probably don't even make that much money with their cheap shi$ tactics. My vote is ban them, at least from tournaments or regular gambling activities. If a stand up champ walked through the door they would run like scared children.