Just because you don't smell it doesn't mean they don't have a smell.
My ex-boss started smoking again after he discovered them. Guy puffed it like he was in a noir film, blew the vapor all over the place. They most definitely have a smell, and I'd often end up stinking of it when I got home from work.
Banning perfume would be nice while we are at it. If I can smell you in the elevator, and you are not in that elevator, then there is a problem. If e-cig "smell" qualifies it for a ban, then I cannot see any possible argument for not similarly banning indoor use of perfume.
Hell, let's just start off by banning everything that may pose any kind of risk and then only unban the things that are deemed safe and positive by our unbiased and benevolent leaders.
Although I'd rather biased people tell me I can do things than tell me I can't. Then I can make my own choices.
I'd rather err on the side of personal freedom, especially when those trying to decide how we live our lives may have an agenda. That agenda could often even be promoting a different industry's interests, for example banning internet poker was heavily pushed by the brick and mortar casinos.
My ex-boss started smoking again after he discovered them. Guy puffed it like he was in a noir film, blew the vapor all over the place. They most definitely have a smell, and I'd often end up stinking of it when I got home from work.