Ok.. not to be an ..., but....
If it looks like a duck, walks like a duck, quacks like a duck....
Basically the waitress was open minded, but the manager was looking at the fact that other customers might not understand. Yeah I'd be a little peeved at the outcome but that isn't my decision, nor the girl with the humongous knockers and tight ... in those little orange shorts (love Hooters btw)..
If I were manager of an establishment and I didn't know any better (read: Haven't done research), I'd assume the worst and make my decision based on that. It doesn't mean he's an ignorant .......... just means he's a skeptic. There's nothing wrong with that.
As for blowing vapor in someone's face.. That's just ridiculous. People like that are hurting more than helping. They're the same people that will ..... and whine and moan if/when PV's are banned, when in all actuality their attitude and actions are a reason that caused it. This holier than thou attitude thing that comes with vaping needs to stop. If I'm vaping, I don't hide it. But if it's bothering someone, I explain it to them, and send them in the proper direction for researching. If after that, they still don't want me doing it around them, I'll give them a chance to research it and try to avoid doing it while they're close enough to see any vape. I, under normal circumstances, Ie. in a privately owned establishment, or non-smoking area (breakroom @ wal-mart) hold off on puffing if they're in my vicinity. Blowing something they know nothing about in someone's face is just stupid, and hurts our efforts to let the general public know.
Hiding it is just as bad as blowing it in someone's face imo. You're not doing anything wrong. Trying to hide it, just gives people the impression you think you're guilty of something. If you are the personable type, able to communicate without being obnoxious and overbearing, opinionated and holier than thou, then you should use that ability to help our cause. Do research, learn for yourself where to get unbiased (that means either way, positive or negative) information. After that, once you know where to direct people, then you can point people in the right direction.
When you were old enough to find a better way to get your fix without hurting other people (physically), you should've gained the mentality to get your fix without unnecessarily offending people.
Just a thought.
Edit: (VaporHead4Life, you're the personable type. When I went on the rant, it was more directed at people like the guy that posted about blowing vape in the guys face at wal-mart, then blowing it at the camera (that, as a wal-mart employee, know had a 1 in 5 chance of actually recording).. like he was hot xxxx. Loved your idea for the tube feeding the atomizer.)