Yeah, once you remove the hazards inherent in cigarette and/or cigar smoking from the discussion, the only solid objection I've heard to nictotine consumption is that it's probably more addictive than caffeine.

I understand why personal vaporizer use was demonized, but -goddamn- that's going to be a public health disaster only an order of magnitude or two smaller than when folks started demonizing nuclear power back in the mid 1900's.