Just 15 yrs ago in a certain now defunct all-red airline based in the EU all the unused booze was put into a carrier bag and carried to the crewroom for consumption there. (This on the frequent holiday charter flights that had a free bar so there was no accounting. Why give it back to the caterers?) Apart from what was consumed during the taxy onto stand of course. It was not unknown for the early crews to find a late crew (or two) sprawled raucously over the tables in the crewroom at 0430
So what?
Its rather comical to see the surprise and incredulity from people who joined this business after the fun police arrived. It wasn't always this anal, you know!