Should be handled accordingly...
While deadheading on a Continental flight (B707, long ago), one of the pax came up for a visit (told you it was long ago...) and informed the Captain that the InFlight Supervisor had told him that HE was in charge of the flight.
The Captain summoned the chap and asked him (yes, a boy) if he knew where the nose of the aeroplane was.
The fellow says..."well, yes Captain".
Captain says..."just to be sure, look down, way down over the glareshield to be sure.
IFS does so and says he sees the nose of the aeroplane.
Captain mentions...."do you KNOW where the white light at the tail is?"
IFS replies in the affirmative.
Captain says...."in between those two places, it belongs to ME, every thing else is yours...now get your skinny @ss back in the cabin and keep your mouth SHUT".
IFS retreats...without a word.
Worked like a charm.