I guess that the law regarding trespass is different in the US; here in the UK trespass is a civil matter and I believe that the police cannot intervene unless a criminal act is also being committed.
To be honest, I wouldn't want anyone routinely traipsing through my business premises just to use the crapper without buying something, unless they could honestly declare a medical need. But if they asked nicely beforehand, as I believe these gents did, then that might also make a difference to my attitude
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