On private property you are always privileged to be there and the owner can ask you to leave at any point for any reason. If you act considerately and don't ca

On private property you are always privileged to be there and the owner can ask you to leave at any point for any reason. If you act considerately and don't cause problems (like occupying space when you are not spending) then this is less likely to happen, so there is certainly a degree of self interest.