Apologies, my mistake I lost track of what was being discussed.The context above was cigarettes, i.e. smokeable tobacco, not vaping. To see about the black market for that all you have to do is check really high tax jurisdictions like NYC or Australia. Cigarettes remain legal there, but already half or more of the market is "informal".
As for vaping, I'm not sure how I would react if I were cut off from it. I don't intend to find out either.
I agree cut off cigs and it would be bad.