Well its both. Obviously its a bad habit. BUT its also an assault on our civil and personal liberty. The government doesn't have the RIGHT to finger-wag, badger, harass, humiliate and make people pariahs.
I find there is a big difference though between vaping and smoking tobacco products. Vape juice contains nicotine as the active ingredient, whilst in tobacco there are small quantities of harmala alkaloids, that act as reversible monoamine oxidase inhibitors and
the difference is huge, nicotine alone isn't actually that addictive, without the MAOI factor. And nor is it as rewarding when intaken. A mixture with nicotine and added harmine and harmaline in small quantities (such as to replicate, roughly, the amounts absorbed when smoking say, a drag on a cigar per puff of the modded vape juice is something I really want to try, by extracting harmine, harmaline and perhaps, to avoid pulling out the likes of vasicine, vascinone etc. from harmala seed, using Banisteriopsis caapi, which would add tetrahydroharmine in the mix, but it would not be untoward in activity. (also I'd quite like to bioassay tetrahydroharmine on its own, to see what differences there might be between THH, harmine, harmaline and mixtures of the latter, since tetrahydroharmine IIRC occurs only in the B.caapi vine, and relatives, possibly other plants but in Peganum harmala there is no THH present) So just out of curiosity I'd give it a bioassay or two.