there is afamous story of the saneigar shel Yisroel Hatzadik Rav Levi Yitzchok MiBarditchev.
In Russia there was a law that the growth of Tabbaco plant was illegal. One erev Pesach Rav Levi Yizchok asked his shamash to see if he could round up any tobacco from the local Jews. It turned out that many Jews had found ingenious ways to camouflage their growing of tobacco and the shamash came back with a plentiful supply of tobacco.
Then Rav Levi Yitchok asked his shamash to try to find some beer from the local Jews. He searched high and low and was not able to find even the smallest amount. He returned and told Rav Levi Yitchok that he could not find any beer, to which the Barditchever repiled, “Mi Keamcha Yisroel”
So to answer your question and to try to be a saneigar for Klal Yisroel especially at a time when we have enough Kitrug Yes if tabacco was found to be assur Behanaah (which would cause the smoking of it to be assur Jews would stop smoking (or would very quickly find a acceptable alternative.