I think that if someone has a 0% alcohol consumption limitation, it falls under the same category as any other strict dietary issue like allergies or religious restrictions, and is up to the person with the restriction to ensure that the food they are eating conforms to their rules.
If I were making a sauce with a lot of alcohol in it, I might mention it. If I know that my guests are not complete teatotallers, it wouldn't occur to me to announce the use of a bit of wine in dish, or vanilla extract in the dessert, any more than I'd announce the presence of gluten to a non gluten-free guest.