Thank goodness someone in this thread finally cast a stone; for a minute there, I was worried the OP had the moral high ground.
While I do not condone DUI/DWI at all, no exceptions, if the AZ law is like the Oklahoma one then the cops can arrest you for DUI just by having car keys on you or being around your car as they say you have the "intent" to drive. I do find that a big stretch. I knew two people who got tagged for it; one didn't even own a car in OKC, the other was sleeping it off in the back seat as he awaited his sober friend to drive him home. $#!t happens.
If one is drunk and behind the wheel that is serious and there should be no excuse for it.