I don't care if it is illegal now or in the future. I'll vape anywhere I please. I'd be discreet, of course, and do my best to respect others. I have spent the first half of my life obeying nonsensical laws such as this would be, and I intend to spend the second half of my life (which will be longer thanks to vaping instead of smoking) only giving my attention to things that really matter.
My philosophy is rather controversial, and will probably cause some jaws to drop... but here it is: I will only obey laws that aren't ridiculous.
Laws against theft, murder, rape, speeding, etc., are reasonable... even laws about smoking (and subjecting others to 2nd hand smoke) are mostly reasonable... but a "You can't do (insert controversial action here) because I don't understand what it is, and refuse to take the time to understand it" type of law is ridiculous... and I will never obey any such nonsense.