I recently vaped in someone else's car (a non-smoker) and after running an errand was thinking about how utterly fast the vapor dissipated in this tightly enclosed space (windows up). Really made me think that the idea of
vaping indoors, in tightly enclosed spaces, is really far less of an issue than even some vapers claim it to be.
Admittedly, when you see vapor exhaled out of your own mouth, or someone else's, I could see how a non-smoker might say, "well that's going to be a problem." But if you give it like 20 seconds, it certainly appears like, "problem" is gone.