... I have yet to have someone walk up and say anything derogatory...
So far I have once and it bothered me for a while, I was downtown in a bar that I have asked multiple times if it's okay to vape inside and they have so far always allowed it. One night at this bar I was walking through people and exhaling some vape through my nose and I walk near this guy and he says "Hey, go blow that s... somewhere else." I was really confused because he was nowhere near anything I exhaled, and I don't blow clouds in peoples faces, I asked him "what?" and he said the same thing and I told him that I talked to the people that work there and they said it was okay. But he just said he doesn't care and to do it somewhere else. In my slightly intoxicated state I really wanted to go off and explain it all to him, but I withheld any further comments and walked away and found my group and continued vaping in that bar the rest of the night away from that guy. I didn't argue because I didn't want him to go and whine and complain to the employees and then have them change the rules and no longer allow vaping inside.
It just bothered me for a while, cause I felt like I had to keep my mouth shut so I didn't ruin it for others. Most of the time if people say anything to me, they just ask me what flavor it is or what it is etc.