Perceptions??
I remember an occasion where two RFDS pilots who had finished their day's flying on a very hot day, consumed a can of beer while completing their paperwork in the office. But the job was still not completed. The aircraft were still on the tarmac, and the routine was for pilots to make sure the aircraft were prepared for an immediate departure, and secured before they went home.
Then the phone rang, and we were told that the CEO was in town, and was about to visit us. Those aircraft were put to bed in record time, and the pilots disappeared.
There was never any time when any of the pilots would ever consider flying after drinking, but it could have appeared that way, and been very hard to explain, on this occasion.
Perceptions are important.
I believe there should not be alcohol at any premises where pilots are during their duty times.
One of the pilots I worked with was sentenced to four months in an overseas prison for being on duty with a high blood alcohol level. I don't think he actually flew.
It is real.