> Many people seem to believe that vaping is harmless

I don’t really buy that premise, at least for some significant definition of many (some definitely, but many?).

On the other hand, what is a cost free activity anyways? A can of Coke (sugar) is pretty bad for you, I’m glad I’ve given that up. My wife thinks the sugar free stuff I’ve switched to is still bad for me, ugh. I guess only water would be considered cost free in that context.