Hi,
I was a 23-years smoker before I become a vaper.
I am a Malaysian Chinese and things are not going well with VAPING in Malaysia...
The 2 most frequent condemns I heard are:
1. This thing is more toxic than cigarette
2. Are you intend to live shorter by vaping?
Nowadays, I am tire of explaining why vaping is much better than smoking.
lol, haven't you heard that genitals fall off too?
Just kidding
There is many ignorant people who've heard something bad on tv or read somewhere and they believe to it more than to the facts and proves.
Just as "exploding batteries" stories, bull crap, if person know what he is doing and not going to look for "cheapest possible" batteries, this crap would never happen to anyone.
So answers to both of your questions:
1. Its not toxic at all, look up yourself what is Vegetable Glycerin, Propylene Glycol, Nicotine and Flavorings,
Vegetable Glycerin - Used in food the most, mostly in confectionery. Also used in SPA and in soap making.
Propylene Glycol - Used in inhalers for asthmatics.
Nicotine - Used in pharmaceutical drugs its not as bad as we used to think when smoking, we blamed nicotine while its not that bad without all the chemicals used in cigarettes.
Flavorings - Used everywhere, from food to drinks, mostly confectionery, though here is where you have to be careful and buy only the ones that without Diacetyl.
2. This question is new to me, people usually say crap about vaping but not about shortening life

Trust me 1 day of vaping instead 1 day of smoking, live +2 more days longer

.