I have done it
Coming back from Japan stop in Seattle. Got on a USAIR flight to PHL FA asked if I wanted coffee (7 am), I answered no, I would like a scotch make it a double, actually make it 2 doubles. I did get some strange looks from the passengers. When she brought the drinks I asked her to not wake me for breakfast or anything else, then she understood. Asked where I was coming in from told her Narita and I was behind screaming children (in business class), for the flight over.
I did not wake up until PHL, only to find 2 more scotch bottles waiting for me (great service). I also drink in the middle of the flight to from SIN each time