I use an e-gig, been almost 6 months now and this is the first thing that has actually got me off cigs. I am not a douce that would pull that kind of stunt though, everyone in a public place should agree it's OK.
I still think it's funny to see some people pretend to hack when I blow out some water vapor
I do have staff that take it a little far at customer sites; puffing in meetings, etc.
I am working on lower the nicotine to nothing then quitting, but it's still a ways away.
I guess there are smokers/vapors just as adamant about there crap as non-smokers are about theirs.