it really depends on the respect and control level of the person who may be carrying and drinking honestly.
i've seen a LEO friend of my 100% in the bag, with a S&W semi auto in a IWB that never even touched the firearm, then again i've seen a Navy seal who had 3 beers unholster and shoot a tv.
i myself will drink while carrying. .....in my own home. but i limit myself to 2 beers. then cutt if off, or unload and store my weapon if i am going to have more.
i NEVER drink outside while carrying, if im out to dinner and im goin to have a beer, i excuse myself, unload, and lock my weapon in a lockbox in the trunk, return to the restraunt and have a few beers.
it really depends on the level of respect, and self control of the holder of the weapon, if your one to get roudy, lound, irrate or violent when you drink and cannot keep a level head. it is a horrible combination. but if you have drank before while armed. and never even thought of touching the weapon. then thats a personal choice.
second thing you have to think about is discharging a weapon while intoxicated. this should NEVER be done. even if it is in self defense, its like drinking and driving. i've shot drunk. at a paper target. BAD IDEA i put 10 rnds of 9mm 15 yards downrage. i missed the paper every time. whereas usually i could double tap the SOB untill the cows came home. if your drunk. you wont hit your target. meaning in SD...........you will shoot bystanders or family and friends. if your drunk and a SD situation arrises. do yourself a favor and pass the weapon to someone who is level headed and SOBER.
NTM any DA who handles a case of you shooting someone in self defense when intoxicated will nail you to a wall...........just sayin.