Its up to a person to smoke if they want. But at the same time, its been demonstrated of the effects of smoking, and/or how the smoker eventually gets addicted to it. However, there have been counter issues eg smoking makes a person relax, etc.. yet it seems the negatives may outweigh the positives for health reasons.

I dont mind people smoking, however at the same time many of us non-smokers do have a right to breath clean air without being covered in cigarettes/cigars/etc that pollute.