I have been vaping for almost 3 years now and this has happened more that once. My husband and I love to play slots and I sit down at a machine to play and a little while latter a woman usually in her 40's or 50's comes and sits down next to me. Now I am in the smoking section of the casino, I blow out a cloud of vapor and the lady starts coughing alot and waving her hands to move the vapor away from her. I usually sit there for a few seconds watching her coughing and waving her hands, then I hold up my PV and say "Lady it is not smoke it is not a cigarette." The look on their face is priceless and then they want to know what it is. I tell them it is vapor and no more coughing or hand waving. It is absolutely amazing to me how quickly the vapor doesn't seem to bother them anymore LOL