Oh yes, absolutely. Compulsory sterilisation for those who may not raise totally healthy children, and bring them up on organic fruit, boiled rice and distilled water. What about the children they already have? Shall we put them in care, or just kill them in case they follow in their biological parent's footsteps? Obviously your point is the smokers aren't fit to raise kids, because a percentage of smokers' kids are more likely to get certain illnesses, and a percentage of people with those illnesses will die young. So also people on low incomes aren't fit to raise kids, because the kids of people on low incomes are more likely to get certain illnesses, and a percentage of those will die young... How about disabled people? People with a BMI over 25? People with a family history of heart disease or cancer or mental health problems or whatnot? A HIGH percentage of the offspring of those get ill and die young. I should think that by your lights it's downright irresponsible for any of those people to bring new lives into the world. How can it be a product of love, when they know they could be sentencing that child to a life of illness and a chance of dying young? By bringing the child into those risky circumstance they are "casually killing" it! Force the lot of them to have "the ability to bear children removed"? I think perhaps it might be saner and a little more sensible to simply educate people as best you can, give recommendations, hope that they pay attention, and let them do their own assessment of the risk involved for smoking, drinking, types of foods, places to live, speeds to drive at and so on.