While it it certainly more agreeable than than tobacco smoke, I don't want vapors breathing out over me with heavilly scented air (if the scents come out with their breath, what other chemicals are coming out too) any more than I would want to smell their bad breath or the exhaust of their cars...
Try and think of it like this. Vapers produce less fumes and smells than a car, but you aren't upset about someone sitting in their car. Vaping doesn't produce harmful fumes, so your opinion on it is really irrelevant.
While I'm all for people stopping smoking, and they should get whatever aids they want/need to do so, vaping seems to be being popularised. It's an aid to stop smoking, and shouldn't be touted as anything 'hip' any-moreso than a crutch helps you recover from a broken leg. I do think they should be availiable.
1) Some people do use vaping as an aid to quit smoking, but most simply switch to vaping as a replacement for smoking. Why?
a) Quitting nicotine is extremely difficult. You have no idea.
b) Smokers enjoy the effects and social interaction of using nicotine
c) Its a lot cheaper than smoking
d) Vaping is non harmful. If there is any harm, it is minuscule compared to smoking.
It is "trendy" because more and more people realise that whilst quitting is beyond them, switching to vaping is not, and leads to a higher quality of life.
2) This isn't a dictatorship - we are free to do anything that we want that isn't proscribed - why should we change our behaviour so that your oral nicotine morality is satisfied?
Personally, I've tried quitting smoking and failed. I've tried switching to vaping and have had zero problems sticking to it. My health has improved markedly; I would probably have died already without vaping.
I value being alive a lot more than I do care about your moral opinions on nicotine.