This could very well work. It could be an athiestic religion. (Meaning no focus on a specific god, but more of a spiritual religion, similar to Buddhism.) That would solve any issue that I'm sure many religious fanatics would bring up. But also, make it compatible with other religions, making it not an exclusive religion, not promoting any higher powers or worship of anything one doesn't feel is god, but promoting your own god, whether it (he/she/He up to you) is a god of a religion, the e-cig itself, your self, the universe, or society.
The basis of using vapor instead of smoke in the OP's argument is pretty sound. You're promoting your life and those around you while not restricting what makes you happy. Which, I'm not sure, but isn't the pursuit of happiness part of the Constitution? If so, they have no legal basis for banning these in the first place as long as nicotine is an unregulated drug. It's sad that the government isn't responsible for it's own actions and that while legally they can't do it, they will anyway. It really makes you wonder about society when people heavily consider creating a religion to go
through legal loopholes.