&quot; they don&#x27;t obviously get to impose penal sanctions on people for saying no&quot;<p>I wonder if there is any negative effects associated with being refused entry by a CBP?  Could it be the case that if you are refused entry once, that in the future they will be more likely to refuse you entry?  If so, that&#x27;s a fairly significant penalty&#x2F;power that the CBP person has.