It’s common sense: When you tax a product, people buy less of it. So, when you heavily tax a potentially life-saving product such as e-cigarettes and vapes, fewer people use it, meaning, sadly, that more people continue to smoke cigarettes and die prematurely as a consequence.

Traditionally, such “sin taxes” are levied on harmful goods such as old-fashioned cigarettes in an effort to discourage their use. But as part of a broader, misguided war on vaping, some states have recently started applying heavy taxes on e-cigarettes, as well. [...]