doorknob,
I agree. You would have to drink a hell of a lot of O'Doule's for it register on an interlock. Eventually the alcohol would probably activate the craving for more.
But it is the mental twist that gets an alcoholic to drink NA beer in the first place. I have seen people in AA who couldn't see a bottle of Martinelli's sparkling cider without remarking that seeing it made them think of alcohol and want to drink. That is the alcoholic mind. That mind will always get an alkie back to a drink. That's why I needed a new mind, a complete re-arrangement. Today I can see something that might remind me of drinking alcohol, but it doesn;t make me want to drink it.