Seem to recall about 20 years ago being told to help myself on a QF flight from Perth-Singapore.
1st drink served at request---2/3,s full of spirit and stuff all room for the coke---bloody strong.
2nd request----help yourself in one of the galleys ,so we did and yes we got pickled.
I can see a problem though with the odd clown who just cant handle his p1ss and gets a bit agro.
"they were the days"