In practice, it is both viable and beneficial, in certain cases, to prioritize non-smokers for healthcare. Where there is more chance of a transplant being successful in a non-smoker for example. It is true that people can knowingly damage their health in other ways, such as drug taking or alcohol abuse and it may well be viable to limit access to healthcare in these cases also. This does not mean that every factor in a patient's life must be scrutinized in order to decide where they are placed on a doctor's waiting list. In public policy, the line must be drawn somewhere. Prioritizing non-smokers can mean that more people can be helped with same amount of resources and, where this is the case, it should be practiced.