Here's how I look at it... in a non-smoker's eyes... its smoke to them. You cannot convince them otherwise.
The rabid anti-smokers be convinced, but very few of them can be convinced quickly, certainly not with 30 seconds of explanation in a crowded restaurant.
I'm in the "don't vape where you can't smoke" crowd, at least in terms of
open vaping. Businesses may very well slowly come around, but I think we can expect bars to ally with us before restaurants, for the most part.
I think it would do us all well to remember one thing: the anti-smoking crowd (except for a few of the real loonies) isn't actually
wrong in their attitudes about cigarettes, and it is not some personal failing on their part that they are not already educated about vaping and the distinctions between the two. And those that do think themselves educated about the evils of "electronic cigarettes" have been lied to.