yod-yog+ais writes:

Anyone who considers "any alcohol in the blood to carry a risk of
impairment" - even if that amount is measured in single-digit
micrograms - is exceptionally stupid.

People who drink and drive/fly tend to be exceptionally stupid, and people who
try to justify such behavior aren't far behind.

Sorry, but nothing you say is going to convince me to toss safety out the
window in favor of taking drugs.

What will you do if he does? How will you know?

I can just follow the smoke to the crash site.