If there was an epidemic of binge drinking in a school, I'm pretty sure the local police would start running sting operations to figure out who's supplying the alcohol.

If there's an epidemic of e-cigarettes, why aren't they doing the same? And I guess I may be ignorant of how the market for these works, but I've never actually seen them in regular shops. Where would I go to buy a Juul? I know there are dedicated vape shops, and also tobacco shops that sell e-cigarettes. Could you run stings there the way many US states run them at stores that sell alcohol?