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The floor needs to be called in this spot. This player may have been a problem in the past or may be in the future. The floor is who is to handle these situations.

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Yes and no. You need to know your floor people. My floor people would not be real happy to have me call them for a player doing this one time (actually there is one floor person who I would call because he he would think it is appropriate). I would not call the floor for this behavior until the problem escalated or the continued. Most floor people I work with would have come over shrugged their shoulders said "Don't do that anymore" and walked away.

I agree that in the ideal world the floor should be called for this AND THE FLOOR SHOULD ADDRESS THE PROBLEM. However the reality in many cardrrooms is that the floor doesn't want to be called everytime a player swears, acts out of turn, and throws his cards. Sure they want to be called the problem escalates, but they want their dealers to handle it first.