I believe that the world's least sophisticated pax are to be found on Haj charters - there are dire stories of people trying to brew up on spirit stoves on the floor, etc. (I think that a Saudi jet was downed by a fire from this cause.)
Years ago ago Pan Am did some of these grim charters, and a crew member told me that she has seen a man standing on the seat, mouth pressed to the air blower, shouting 'Coca Cola please!' apparently under the impression that it was some kind of voicepipe...
