If the vaping doesn't harm people around them then I agree it should not be banned. I guess some people just don't like to be in an area where a cloud of steam/smoke fills the air. I am a non smoker, but I also have several friends who do smoke and when I and the other of my non smoking friends are around them they just respect use and smoke in an area that is not near us. I am fine with that. If people want to smoke they sure are entitled to do it. As for the vaping I have seen many teens using them in my area and I asked on of the teen girls that live in the same apartment building why are all these teens vaping? She told me that they are doing it because there friends are doing it. She then continued to say that most of them did not even smoke cigarettes before they started vaping. I then asked her how do teens under 18 get a vaping device to do this? She said they buy them off of Ebay and places like that.
The thing is, there isn't really any evidence (either way) about this - not everyone is convinced that it doesn't harm others. It isn't just pure water vapor, there are additives that are also being released. So, you have one side saying that it is just like water and no possible harm and the other extreme saying that it is just as bad (for those around) as cigarettes. Like everything, the truth is somewhere in between.
I know it's so confusing these days. I never know what I can and can't bring! Wishing you a safe flight.
I know vapes aren't for me, but I'd never be the type to lecture anyone against them. I don't know much about them anyway, they've never sparked my interest.