unfortunatly rhis is a problem that is all too familiar to air travel.. particularly on long flights..
sometimes passengers have had just enough that prior to boarding they seem harmless but a few scotches later and a bit of altitude they are out of control.. sometimes giving them just one more drink will put them just over the top and a few minutes later they are sleeping like a baby.. of course each case should be judged on its own merit..
alternativly one could just ban liquor full stop... i am sure there would be a few unhappy passengers though... on the other hand maybe the flight attendants could exercise better judgement and not exercise their RSA (responsible service of alcohol)....
added post without proof reading..
ammend :rhis to this and : better judgement and not exercise their RSA should: be better judgement and exercise their RSA