I understand what you are saying, but my premise is founded on "OOS and unavailable for dispatch". In that situation, circumstances can't really change very quickly, a you're unavailable for dispatch under any circumstances.
But if you are OOS and in your mind you are still nonetheless available for dispatch should they call, then I'm right there with ya on the "better safe than stupid" approach.
Not to put too fine of a point on this but let me add that our approach -- no alcohol in our truck or bodies ever when we are out on the road -- goes beyond being available or unavailable for dispatch. The truck is our home and the nation our back yard. Be it for dispatch or personal reasons, we never know when we may have to drive. Thus, no alcohol in our truck or bodies ever when we are out on the road.
Hypothetical examples:
- We are at an RV park, out of service for three days. One of us gets sick and must go to the hospital for more than a day. The other will want to be there too and move the truck to the hospital parking lot.
- We are parked at a relative's house in Ohio and spending nights there, not in the truck, while visiting for several days and resting from the road. Something develops at home -- a family emergency, say -- that requires us to return ASAP, taking the truck because we would not know how long we will be home and the Ohio relative would not want the truck in his yard when we are not there.
For these and many other reasons, no alcohol in the truck or our bodies ever when we are out on the road.
Exception...Expedite Expo! We have only attended once (sorry Lawrence, maybe next year we'll attend again). We are out of service in a hotel. We'll take the risk that an emergency will not develop that would require the truck to be moved. If an emergency did develop, that location provides truck parking and transportation options that may not be available elsewhere.
As professional drivers, the consequences of combining alcohol with our truck are just too severe. We take it a step further than the law requires to eliminate any chance of trouble.