If he smoked a joint, he has already shown he believes he can decide when to comply with laws or rules. Marijuana is still illegal on a Federal level, despite any municipality's or state's attempt to make it legal for medical purposes.

Since he has shown a disregard for civil law, do you think he would be more or less inclined to obey FARs? The use of illegal drugs is a violation of FARs.

On the other hand, alcohol use is condoned if you avoid all use within 12 hours and are sober at the time of duty.

I don't want anybody in my cockpit who thinks he can decide when to be FAR-compliant. That is alcohol, illegal drugs, over-the-counter, or lack of sleep.