Or alcohol? Oh, wait.. they already tried that one.
People are going to do what they want to do. I'm NOT down for smoking in public because I don't want to breath that shit in, second hand or otherwise. But if folks want to smoke in their own homes, that's their choice. Vaping, whatever dude. You wanna vape? Go for it. It doesn't hurt me second hand, unless you're blowing it in my face or trying to hot box in my vicinity, for which there will be other hazards to your health. If it isn't hurting anyone but the user, and the user is an adult, fuck'em. Let'em live their own life.
I think the problem is this is causing massive lung destruction in an incredibly short amount of time.
So it's not like you're just gonna die a couple-few years sooner if you're vaping the wrong stuff.