Smoking, said King James I in 1604, is "loathsome to the eye, hateful to the nose, harmful to the brain, dangerous to the lungs." Three years later he planted a colony in Jamestown. Its tobacco enhanced the royal treasury until Virginia produced a bumper crop of revolutionaries, including the tobacco farmer George Washington.
King James might have been less censorious about "vaping," which almost certainly is less harmful than inhaling chemicals produced by the combustion of tobacco. Users of e-cigarettes inhale vapors from electronic sticks containing a liquid with nicotine, which is addictive and perhaps particularly unhealthy for adolescent brains. Between 2013 and 2014 the use of e-cigarettes by middle- and high-school students tripled, and now exceeds that cohort's use of traditional cigarettes.
E-cigarettes, sometimes flavored to tempt the immature ("Unicorn Puke," "Stoned Smurf," "German Chocolate Beefcake") might be "gateway drugs," leading to tobacco cigarettes. Currently, however, e-cigarettes often are substitutes for them. So, prepare for regulations combining high-mindedness and low cunning.