[JamesBarney]

I don't think he's making the argument that on principle there should never be any e-cigs regulations because cigarettes are harmful.

The algebra for e-cig regulation is # of people saved by regulation - # of people killed by regulation(people who smoke more cigarettes because of the increased cost, and decreased variety of e-cigs)

And because cigarettes are sooooo dangerous even a small increase in smoking can causes the second term to overwhelm the first.