I personally don't care what anyone thinks, and have yet to have anybody question me. I take that back, I have had plenty of people ask me what it was, and they were fascinated, not upset.
This is not to say I'm disrespectful to my surroundings, or places of businesses that I'm in either.
I vape in Wall Mart (all of the time), Airports when I travel, Shopping Mall's (If they can have "Smoke Anywhere" kiosk's, then I'm vaping) and plenty of restaurants (stealth hit), so forth and so on.