Yes they do. In this case, I'm quoting an authority, the FDA, to combat the frivolous claim that e-cigs are "perfectly harmless". And I've also referred to the German study that said they release a cocktail of chemicals into the air. That's also an appeal to authority in the form of a scientific study.
My appeal to authority beats your Alinsky tactic of labeling your opposition as "fearmongering" hands down.
According to who?
Know how you can tell a fear monger? They always speak in dire terms of “risk”, but will never attempt and will actively avoid trying to quantify exactly how much “risk” is actually involved.