This is quite the topic. While some airports do not have rules against it, like Denver international, which I am currently at with a delayed flight. I find myself in the smokers lounge (I am not a confrontational person so I avoid it at all costs). It is a bit of an inconvenience and the smell is terrible. But I am trying to look at it positively as a test of my strength in not being tempted and I must say I am not in the least bit temped thanks to the smell . I hope that at some point it will be more widely accepted and we can vape wherever we please. I will explain more on my youtube channel later on this week.