Hater's gonna hate. No getting around that.
But like with anything, using manners helps out. If you know someone doesn't like this or that, in this case vape exhaust then try to do it down wind. In a car, roll the window down some and blow that direction.
When I was a kid while taking a Sunday drive my pop would light a cigarette, roll up the windows so no ac would escape and then hold the cigarette in front of one of the vents. Man, in the back seat your eyes would be burning and it was a drag.
Don't you dare roll down your window. Now he wasn't mean or anything, he just didn't understand what his tip smoke was doing. That stuck with me during my adult years. It became obvious that my smoke (or now steam) actually bothers some people.
When a cranky person says "I hate those cotton candy machines" or that sort of thing when we are outside in the wide open my reaction is to ignore the comment since it's obvious that person hates sunshine on a rainy day or the laughter of a child. Can't fix that.
But when the question comes up "don't those things explode?", I see that as a teachable moment. One that a few carefully chosen words can educate the person on how the technology of rechargeable batteries has evolved to a significantly safer product thanks to vapers, laptops and flashlights. The person may end up opting to use a rechargeable battery in their remote control, or wall clock.... perhaps a camera.
I don't dare say "celphones use them" knowing that Samsung thing will be a comeback. You have about 30 seconds to educate. After that you either have their attention in a positive way, or a debate has ensued.... or the subject changes.