Taking drink from the aircraft has been part of the airline industry since before Pontius was a pilot. It is now, quite rightly in my opinion, looked on as something that should not be happening. However some sort of sense is needed in applying the rules, the famous (or infamous) BA sausage incident at LHR recently is an example of rules gone mad. There is a big difference between emptying the first class bar into your bag to start the room party off with 5 bottles of Krug at £60 a go and taking a bottle of mineral water with you because the hotel water is undrinkable.