However, I suggest to you that many of these reports of booze in the cockpit are about non-alcoholics. Alcoholics expertly manage their booze consumption so they avoid the most obvious pitfalls. I drank for 26 years and never blew over the limit behind the wheel: alcoholics can do that.
A simple over the counter Breathalyzer would surprise many to their BAC in the morning. Not a pilot but as regulated as an AMT I learned my limit this way. The 12hrs bottle to throttle guideline does not work. Size, weight body function.. To many variables.