Do they stink like regular cigarettes? The horrible stench of regular cigarettes is worse than any possible carcinogens to me, ugh!
Nicotine vaporizers have no scent that I've ever been aware of. I've had a couple myself, and they have found quite a bit of popularity in my neighborhood very recently. You can't even tell someone is smoking one unless you see them take a puff. As far as I've been able to tell, there is no scent.
I think people just need to have some common decency.
You said you still smoke. Smokers have a terrible sense of smell. You would have to ask a non-smoker if the e-cigs smell.
If you wonder: They do. Not anywhere near as bad as a real cigarette, but they do smell.