As someone who "vapes" and is over 21 I would be afraid that it would limit availability overall. I know smoking is bad. Everyone who smokes knows that it's a serious health hazard. However, I would rather there be a ban on tobacco cigarettes before vaping. Many stores have a mandatory ID check to purchase any tobacco product and that should be enough. As for marketing to kids....there are so many products out there that do. Where do you draw the line? Cereals, sodas...junk food in general. Banning them would be just as beneficial to overall health.