i usually just ask whatever establishment i am in if its ok to
vape and if they dont know what im talking bout i explain it.
at college, i've just asked my professors and neighbors. if the prof says its ok but the other guys wong, i just move to the back corner.
of course the chem teachers were very cool bout it.
outdoors the most ive gotten is ppl ask if im
vaping weed or smelling a marker.