Every regulatory regime will get you so far, after which you start plateauing the impact of that. I don't want people to walk away saying that e-cigarettes are the magic bullet that will fix everything, but it certainly does require study.
It does require regulatory framework under which we can look at changing how the product is delivered and how it's used, so that you minimize its impact on all of society. You're right, there is no single framework, whether we ban something or we keep it legal, that will solve these human problems, but we certainly can have the maximum benefit to the most and produce an equity by having these frameworks.