May I submit you do see the reason, even, you named it? :) They are a user of a payphone, not subleasing a number that could be used for robodialing.
replyAnd if they stand at the payphone and make scam calls for an hour and someone reports this and the payphone operator gets asked to identify this customer of theirs?
replyThen a police officer can visit the payphone and find out.
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