We have them here, have had for quite some time now. They make no difference so far as I can tell.
Let people do what they want, make their own mistakes. Warning labels on cigarettes is not going to do anything. Is there anybody in a western country in this day and age who could go and pickup a pack of smokes, read the label and go "****, these things are bad for you, I never knew!" and throw them away then and there? Scratch that, is there anyone who actually even reads warning labels anymore for anything other than entertainment value of the badly translated text?
The whole idea of people putting a drain on the system is pretty bunk imo anyway. I mean, sure, they cost money in healthcare, but I am fairly sure a good percentage of that is covered by the taxes they charge, if not exceeded. Not to mention, by the time the adverse health effects of smoking kick in, you are already nearing retirement age and about to become a drain on the system anyway. The quicker you die, the quicker the government can cut your pension as well as try and soak up some of your estate.
I mean, what is the cost of giving someone a couple of years treatment for lung cancer. Compare that to the cost of keeping a pensioner alive for 40 years, and then treating them for whatever other type of cancer or health condition they will invariably end up with anyway, and it seems like killing them of with cigarettes (which they pay for) would be somewhat cost effective, no?