I think that you've forgotten the stand point that the FDA has taken. All that you have listed is sold at quality controlled dosages, the highest (I believe is 7-8mg of nicotine per 16-24 hour period)
Their supposed concern is that the nicotine is not under quality control because it's from China, since China does not have the same standards of quality control like things manufactured here in the U.S. and other regions that have the same practices. There seems to be many issues revolving FDA's concerns, like cross contamination, misuse and misguided medical claims and such.
Water vapor? Who steered you wrong?
Don't claim the vapor to be something that it is not.
Think of it as an odorless fume. This is the most correct description of the emission from your E-cig to mouth to exhale.
Just because it is liquid, gives you no right to assume that it is just water vapor. In that regards, heat up some odorless turpentine till it "vaporizes," take a deep breath and tell me if you still think that's water vapor.
I believe there is a fighting chance to have this not be banned. I believe the steps needed to be taken are, establishments under FDA guidelines and approval manufacturing the
e-liquid. Selling only pre-measured cartridges, to reduce cross contamination to consumers of this controlled drug. Making no medical claims, until claims can be proven, and paying government taxes on the tobacco based product.
I personally think this is the route that will be taken. I don't believe that the E-cig device will be banned, as they haven't banned bongs and vaporizers in head shops. But, I do believe buying E-liquid direct from China will be and allowing a U.S. or FDA approved manufacture to take over the market, who will buy it from China...like Phillip Morris.