Actually chucking out I have done this out and out once, there have been other times I should have walked.
The once was someone who despite me clearly mentioned my drug & alcohol policy, turned up to an advance booking in his own words 'coked up'. I could tell as soon as I clapped eyes on him, that pale clammy skin, pallor of his face. For a moment I thought about carrying on, but had had this done too many times - and if he's got away with that what else does he think he will get away with.
He lost his deposit, I gave him the cash he had just given me back.