Some big colleges in the US are banning vaping on school grounds (indoors and outdoors). I think it's a reasonable rule to have for a hospital or laboratory, where the environment needs to be as controlled and contaminant-free as possible. Nicotine being fundamentally bad? Unstable batteries? That does seem a bit kneejerk, and unsubstantiated. Some airplanes or confined environments ban heavy perfume, out of respect for people with asthma and sinus issues. This is a much more justifiable reason IMHO. Either way, banning it outdoors seems a bit far... it seems like less work to equate vaping with smoking, instead of actually treating it as its own thing.