Smoking is one of the issue on which I have a hard time making up my mind. On one hand, I believe people should have the right to do as they please, as long as it doesn't harm anyone. I don't smoke personally, and my lungs object to the very notion, but I can see why people do it, I suppose. I do, after all, do things that aren't healthy, too. The main difference is that the things I do that aren't healthy, don't have the potential to damage people around me. The smoking laws that have been implemented in various countries, my own included, seem like a reasonable compromise. Illegalizing smoking outright would be a long leap in the wrong direction. So there's the rational side of it, and I haven't been able to get any further than that.
However, I do think people ought to be discouraged from smoking. I don't know how effective warnings and pictures are, but whatever else can be said, I can't imagine anyone looking at them and thinking to themselves, "I have to take up smoking". The main thing, I would say, is this: smoking comes at a cost, not just for the individual but society at large, and not just a monetary cost. It seems to me it would be in the best interest of the state to get people to quit - or at least to prevent more people from starting. And when it comes to warnings, the thing to ask is this: are they misleading or wrong? If not - and I think at this point we can all agree that smoking does, indeed, increase your risk of lung cancer and so on - then it seems to me there's nothing really wrong about having them there.