Sorry, perhaps I was too blunt. I'm not looking to pass any sort of moral judgement against nicotine or tobacco users, here. I'm more trying to call attention

Sorry, perhaps I was too blunt. I'm not looking to pass any sort of moral judgement against nicotine or tobacco users, here. I'm more trying to call attention to some tension. The idea that vape juice should be tightly regulated to keep harmful chemicals out implies that we should be defining some sort of toxicological ceiling on what things are allowed. And I'm wondering what that would look like, and how it would work out in practice. If we focus on LD50, I doubt there's much that goes into vape juice with a higher LD50 than nicotine, aside from perhaps something egregious like what's killing all these kids in TFA. If we focus on some long-term health outcome, it's probably similar - nicotine in isolation hasn't been as well-studied as whole tobacco, but it seems unlikely that, upon closer scrutiny, a chemical with such strong acute physiological effects wouldn't turn out to have some fairly serious chronic health effects, too. We narrow in on cancer, sure, but that seems like a standard that's more specifically for establishing that vaping is less harmful than cigarettes than it is for establishing an overall consumer product safety standard. My inclination would be to say that a better starting place might be just to require vape juice to post ingredients labels, and set up some enforcement there. It's possibly not as strong a regulation as tightly controlling what's allowed to go into vape juice in the first place, but I'm guessing it also has a lower risk of creating a "be careful what you wish for..." situation for people who vape.