I agree wholeheartedly. (Actually with your entire post, but it was too long to quote in it entirety.)
Nobody will dare bring back prohibition. Smoking is still legal in all states, in all cities, the government is just restricting the places one can smoke. They restrict the places we can drink alcoholic beverages, the places we can "relieve ourselves", the places we can change our clothing. These "bans" are just more of the same, with the added bonus of making public places safe for the asthmatic and emphysemic.