Honestly, it doesn't matter, because I used to smoke myself and I understand both sides.
Everyone with there own opinion and smokes are not supposed to be seen like an alien. They are humans too.
I keep seeing smokers are liable to die young, so who is not liable to die young? Anyone can die at any point in time and I think people should not always see smokers like the only set of people that are liable to die at any time. Smoke is not the only causative of cancer and other diseases which we don't need to assume that smokers could be the only ones that could die young.