let's see... I stealth vaped at the courthouse (in the lobby, not the courtroom), my daughter's choir concert, the movies, most stores and bars and anywhere I work. I work in film/theatre and you rarely get 'smoke breaks' so it's nice to just take a puff while I'm running from place to place.
The only negative reaction I've ever had was outside a walmart (not near the outside ashtray). I was on my phone before heading into the store and a woman walked by me right as I let out a puff. She fake coughed and waved her hand in front of her face (she was a good 5 ft from me)
I just put my LED against my forehead and said "IT'S NOT REAL!"
She just huffed and walked away.
Overall, I've had a really good response. I was vaping at a client's office one day off and on when people weren't around and the boss walked by right after I'd let out a puff. She thought she saw smoke and asked me about it. I just played dumb and said "I don't smell anything?"
She just said "hmm me either" and went on her way lol