Actually, vaping was never supposed to be about nicotine cessation. The chap that invented the first ecigarette wanted a safe alternative to inhaling nicotine after his father died from lung cancer. In other words, smokers could switch to vaping and be life long vapers if they so desire.
The smoking cessation route only really came in to effect as a marketing feature. Save money, gradually reduce your nicotine and quit. Unfortunately, as vaping contains nicotine too, it still requires willpower to use the ecig, drop the nicotine strengths and eventually give up.
At the moment it is up to the owner of a building or company to allow or disallow vaping.
I do agree with other posters, in my opinion you shouldn't vape anywhere where you wouldn't smoke. Also common courtesy, just because vaping is safer than smoking doesn't mean someone wants a cloud of secondhand vape in their face.
There is a very good documentary on horizon regarding vaping, it's safety and passive vaping.
I work as a vape shop manager and vape myself, regardless, I discourage my children from thinking it's a cool thing to do. In the past four years of working in the industry, I've seen vaping give people back their health and my own, however it's still a method of taking in nicotine and should only be for those that already smoke.