Should smoking be banned in public places

People always debate about whether smoking should be banned in public places or not. Smokers of course do not see why it should be banned and non smokers say that it should be bad because secondhand smoking is very bad for their health. Personally, I am not a smoker but I believe that it should not be banned from public places. I mean yes smoking is dangerous but I am sure almost every smoker knows that and yet they still do it. I think that banning smoking will not do anyone any good. People will still smoke no matter what. Weed is illegal but people still smoke it! Drinking under 18 is illegal but teenagers still drink. If smoking is banned, what is next? Not being able to drive your car because it will cause air pollution which also causes cancer! I do not think that it is fair to smokers. Can you imagine not being able to drive you car? I mean smokers pay taxes when they buy cigarettes; I think that they should be allowed to smoke in public.