Out in public you're an ambassador for vaping, if you don't respect a nonsmokers right to breathe clean fresh air you'll do more damage to the cause than good. If you want to be seen fine, let people come over and ask you about it, but keep a polite distance from others. We don't need a law for that, a law for common sense and good manners.
Some of you sound like you'd quite happily vape your way around the asthma ward of your local hospital, simply because it hasn't been banned yet.
From the "be respectful and try not to vape in public crowd" then everyone, including ANTZ types, are ambassadors for vaping. Because, if you are not into openly vaping in public, but are pro vaping, then how is anyone in public to know this?
But you are speaking to the sub-group that will openly vape in public, and as I am one of those, I feel very confident that I go about it in a respectful way. Not 100% of the time, but I'd say around 85% of the time. So, keeping a polite distance (whatever that is exactly) is something I do when I vape in public. As did OP of this thread. I'm yet to encounter anyone that took issue with my vaping in a public space. OP provided a good example of the other side of the equation that I feel is at least partially what we are up against. And in essence, politically speaking, it is precisely what we are up against. Even among vapers in the vaping community - who say, 'don't blow it in other people's faces.' Of all the times I have vaped in public, including that 15% of time I indirectly referenced before as me not being entirely respectful, I cannot think of a situation where I had opportunity to blow it in a person's face. I can think of hypothetical situations where that could come up (like standing in a line that isn't moving, and I'm feeling impatient enough to say heck I'm just going to vape right here, right now). Those sort of situations are a bit dicey IMO, cause in that same hypothetical, based on my experiences in public, I can imagine many people doing things that would be seen as 'invading the immediate space of others.'
But in say a restaurant, or cafe, or mall, I feel I am always at a 'polite distance' from every other person in the establishment. Thus, blowing vapor into people's faces simply never comes up. Likewise, I can imagine being in a hospital ward (really doesn't matter which one does it?) and maintaining a polite distance from all persons present, and respectfully vaping. I would like to have that discussion with anyone that cares to as to why that particular place is deemed an automatic no-go for vaping. And in the course of that discussion, if I or anyone, can make case for respectful, open vaping in that situation, then I'm thinking it would be much easier to make the case for a whole bunch of other public situations.
Yet, if the nemesis brought up in OP is present, then there really is no place on this planet, that is good for vaping, including own premises. Might seem outlandish right now to even consider that sort of reasoning, but look how smoking bans are transpiring. If I were on the other side of this political debate, I'd be using that as the guideline for how to get rid of vaping not only in public, but in society.