If they want to be consistent, they should demand that homosexuals get a license to practice homosexuality and they should be taxed to cover their increased cost to society for their health care.
So true. Most of the data I've seen on smoking indicate it will reduce the average lifespan by 10 or 12 years or roughly half of what happens to an active practicing homosexual.
If people are nothing more than animals who are stuck with the sexual identity which they are born with, then they are equally stuck with their innate craving for tobacco or alcohol or drugs.