I was trying very hard not to get involved in this conversation, but alas...
First I will say that I would likely not find it necessary to vape on a plane at all. I am a proponent of property rights and if the airline doesn't want me vaping on their plane, I would respect their wishes. However, the fact that some people find it "necessary" to "stealth" does not indicate that is is wrong or illegal - it merely indicates that there are a bunch of ignorant people out there who like to sensationalize things and make a ruckus. There is NO reason vaping anywhere should be considered "wrong" - against the rules? Sure, but wrong - absolutely not.