The Ken":69doe32n said:
One story I always liked (may be urban myth?) is you can get done for drunk driving if you are the only person in a car and have the keys on you. This includes being asleep in the back.
I believe you can, and people have. I think truckers feel the effects, too.
I guess the thing is, with people in cars, or getting in cars, it's an easy excuse ("I was going to sleep it off...").
It'll be "Drunk in charge of a vehicle" or something like that, though, not drunk driving, per se.
I suspect it's the case for many examples that seem ridiculous, it's dealing with the spurious excuses.
In this case, though, they could visually see the example
and they could have used discretion and not bring the reputation of Police into disrepute.