In this case here, to me at least, there is a clear distinction between a demand/command/order by the people (a 'people's mandate') vs. those same people literally asking for government intervention. I will use the case of nicotine again to illustrate this point: would most vapers be on board with saying that it should be mandatory for professional vendors that choose to work with nicotine to possess basic skills with diluting it -- like the ability to dilute from 100 mg/mL down to a target percentage -- before going into business? I am sure not all would agree, but I bet you'd still have a lot of vapers saying "hell yeah, that better be mandatory before trying to sell eliquid," and many would assume that it already is mandatory for a vendor to know how to properly dilute nicotine. Now, if they say it "better be," does that mean that they are going to call in the FDA if it ain't? That to me is being overly technical about semantics. I don't think that means those vapers would require a test of those vendors to pass before going into business, but they feel certain things have become non-negotiable from the places they will patronize. If they find out that vendor is not complying with certain rules the industry has set forth, they will take their dollars (re: enforcement) elsewhere. Some might still say, "well, then, you mean it would simply be a good idea to have those skills, not that you mean mandatory," to which I would say "no, I think it *should* be mandatory for professional eliquid mixers to have basic dilution skills with nicotine if they choose to work with it."
I agree, this (what you have written) is semantics. But the question still remains for those who chose #2, what happens if this is not done? If it is simply "I will spend my dollars elsewhere" then what I am getting at is blowing things out of proportion. I concede that. But the word 'mandatorily' within context of what vaping politics just went through this year (or even within last 4 months) seems like a word that is challenging to dismiss as purely semantical. If we take ANTZ out of the picture (bye bye ANTZ) and ask non-vaper / neutral observer who happens to be aware of FDA proposed regulations for eCig industry, I believe this observer would think that a decent portion of vapers favors regulations, for sake of safety of their products. To avoid that perception, it would take some technical maneuvering and explanation that amounts to 'we kinda sorta do want regulation' but not government regulation.
From what I get in reading this thread, and particularly with dialoguing with you here (and a small number of others) is that it is less "should be madatorily disclosed" and far closer to, "I'd like to have that sort of info, wherever possible."
But as we are in a thread with title that contains "debate" and getting technical on what type of chemical are we talking about (exactly) and how dangerous is it (really) and at what levels (precisely), then as one who is aware of FDA proposed regulations and still thinks #3 is most viable answer, I think it is prudent to explore what those who selected #2 believe when they are on board with "should be mandatorily disclosed." And to ask these same people, what do you think ought to happen, if anything, to any vendor who doesn't conform to your desire to disclose said information?