Why would a non-smoker want to avoid e-cigs?

Not sure: Unsure of whether you mean a non-smoker should start smoking e-cigs, or remain around someone using an e-cig. If you are a non-smoker, why do you want to develop a nicotine habit? E-cigs are equally addicting to regular cigarettes, and may even deliver more nicotine, but less of the other harmful products of tobacco. There is less side stream smoke, so there is less second hand exposure.

E-cigarettes.: Technically speaking, we don't really know the safety of those electronic cigarettes in the long term; newer studies are revealing evidence of harm. But what they do help with is removing your emotional and mental attachment to actual cigarettes, which could ultimately help you quit everything. As well, there seem to be fewer ingredients in them; there are 42 carcinogens in cigarettes.