I should just let this go, but part of what offends me about vaping is that people will do it instead of smoking in spaces where smoking is explicitly banned. Since it’s smoking adjacent to me mentally (and to a limited extent in causing harm to third parties), I dislike that. And we do ban things like perfume in gyms because it causes unreasonably unpleasant experiences for the people around you, and I shower after grilling or frying if I’m going out, because it is unpleasant for the people around me. It’s different degrees of unpleasantness for everything, but I don’t think it’s unfair for me to dislike people blowing vape clouds in my face indoors.