As for the public, don't forget that the general populace has been trained for several decades to demonize tobacco, and those that use it. There has been BILLIONS of dollars spent on this effort, and in the public's eye, white plumes of vapor = smoking, therefore it's bad for you, and should be stamped out, and you should be ashamed of yourself.
It's disheartening, but it's to be expected. It's up to US to educate, not hide - and maintain civility along the way. If someone is bothered by my vapor - for whatever reasons - I can stop for a bit, just to be nice.
It all reminds me of the low carb fad. I had cooincidently taken up low carb two years before it started (with spectacular results, and I still do it), and when I cae out of the closet, so to speak, when it became a fad, I was literally assaulted by people and their opinion of what's healthy, and what's not - and experienced the kind of brick wall, "You're wrong no matter what facts you present" attitudes that we're going to be dealing with, with vaping.