If the airline concerned chooses to offer in flight service that includes alcohol, then you are fully entitled to partake of that offering. It is no business of the passenger to request you to refrain, I would have told him politely to **** off or to travel with some 'more enlightened' carrier.
Honestly the stories you hear about some of these hypocrits and their behaviour wrt alcohol when on board is staggering.
I don't do political correctness
