http://www.fda.gov/NewsEvents/PublicHealthFocus/ucm173146.htm http://www.fda.gov/NewsEvents/PublicHealthFocus/ucm173146.ht... https://en.wikipedia.org/wiki/Ele

http://www.fda.gov/NewsEvents/PublicHealthFocus/ucm173146.htm http://www.fda.gov/NewsEvents/PublicHealthFocus/ucm173146.ht... https://en.wikipedia.org/wiki/Electronic_cigarette https://en.wikipedia.org/wiki/Electronic_cigarette "In some e-cigarettes, "Tobacco-specific impurities suspected of being harmful to humans – anabasine, myosmine, and β-nicotyrine – were detected in a majority of the samples tested." It is not clear if these chemicals were detectable in exhaled vapour. The UK National Health Service noted that the toxic chemicals found by the FDA were at levels one-thousandth that of cigarette smoke, and that while there is no certainty that these small traces are harmless, initial test results are reassuring." So no, it does not appear to be so cut and dry. The whole issue is that it isn't, and some people have a problem with that concerning a product the user shares with everyone around them.