I'm personally one of the people who doesn't vape anywhere I wouldn't smoke. It's not about health to me (I believe at the very, very least, the effects of 2nd hand smoke were vastly exaggerated). It's about the fact that vaping as an activity was conceived to mimic smoking. Now, my lungs are glad that it was, but there's no getting around the fact that this is how it came to be.
While I'm not the least bit concerned that someone will mistake my Innokin Itazte SVD for a Camel, I'm perfectly aware that the vapor could be mistaken for smoke by someone seeing it. If someone started selling bottled water in a glass container with a label that was meant to look like a Vodka label and I were drinking it in an alcohol free area, my response to the idea of someone asking me not to drink it would not be, "How dare they?!?"
It reminds me of a Dave Chappelle Joke (warning if you're immature, he says a 4 letter word):
Dave Chapelle ..... uniform - YouTube
Now, I think a lot of this is because I think of vaping AS smoking. Sure, it's a little less satisfying and I'm betting my life that it's safer, but the activity is pretty much identical (and the reason I was able to switch when nothing else could get me off cigarettes). The idea that this is something different and we should be able to do it anywhere it's not expressly prohibited strikes me the same as chewing gum being banned in certain areas and people thinking it would be OK to chew some replacement because it's not actually gum I'm chewing.
Anyway, until there are explicit laws and company policies in place it's ultimately up to the individual where he or she vapes. For myself, the fact that I found a substitute for smoking that I hope (and believe) is safer for myself and everyone around me doesn't mean I suddenly got the right to smoke this new substance in places where it's prohibited. Now, if you don't feel that way, well and good.
It does kill me, though, when people assume that my attitude has something to do with shame. I'm not ashamed of anything I do, but I try to avoid passing gas around people because I don't want them farting in my face. Similarly, I don't want to be eating dinner and have their cloud of vape drifting across my food so I don't vape in restaurants.