More popular than you might think - I for one am not exactly thrilled about having my wallet robbed to pay for citizen harassment, and I don't see how this effort is going to be any more successful than Prohibition.
I confess that I took a puff or two when I was in college 30 years ago. It was no big deal. Of course, there is the slippery slope theory, but then maybe we should ban alcohol on that theory as well. Make it legal, but tax it up the wazzoo, like they do cigarettes.