I believe that this problem doesn't exist at airlines such as Saudia Arabian, Royal Brunei, and Kuwait Airways, amongst others.
It is obviously less of a problem as booze is not served on board.
I have seen "regulars" topping up in Heathrow before boarding and then with a bottle of spirits in their pocket are ready to enjoy the trip. To CC " six Cokes and lots of ice please".
The sound of empties rolling around on the floor on arrival is one of my earliest memories of trips to the Gulf.
I have also seen the police at the gate trying to decide if a mate can look after his friend and allow them to board.
One of the feared events on arrival in JED was the religious police tapping ankles of arriving passengers. Socks are an obvious hiding place for miniatures.