Comment: I know a guy who does this as well, and yes ....

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In reply to comment: My brother does this to Drs (see in situ)

I know a guy who does this as well, and yes ....

it works. If his bill is $200.00 and he had to wait 35 minutes past his scheduled allotted time, he charge them for the difference and they adjust the bill.

The last time I talked to him, he said his latest appointment was scheduled for 1:30PM at his Doctors Office; he showed up at 1:15PM and at 1:26PM he was in the room and his Doctor walked in at 1:30PM on the dot .... lol

It most definitely does work; your time is no more free than theirs.