Mockingjay,
From your comments I understand that you detected many instances where passengers consumed their own booze, but some (many?) of those were not abusive. Don't let me put words into your mouth, if I've got it wrong I'm sorry.
It makes me wonder what the motivation is for pax to drink the one they brought with them? I'm guessing that part of the rational are the (somewhat?) high prices the airlines charge for drinks on board. I recall that a 33cl beer on a BRS-GVA flight was more than a pint at the bar at the airport.
Perhaps the airlines should have a think about if they are somehow encouraging this drink your own culture on board.