Oh, the politicians will NEVER ban smoking outright because it generates tens of billions of tax dollars. But they will not hesitate to demonize smokers so they can pile on more taxes and make more restrictions.
Oh, I think that a time will come (likely sooner rather than later) where punitive taxes passed on tobacco products will reach a point of diminishing returns - and at such a point it would be far more profitable for the government to simply sieze the assets of those who would produce, distribute, or consume tobacco products.
I could be wrong - I certainly hope I am.