A "sinful lifestyle" refers to consistently living in a way that goes against moral or ethical standards, often involving actions that are considered wrong or harmful. Full definition
All those with sinful lifestyles should be welcomed, but the Church is no place to feel comfortable for those living as sinners. (religion.blogs.cnn.com)
Yet we do not go to cancer wards preaching to the victims of lung cancer about their sinful lifestyles... Could it be that the weight of our moral judgments is clouded by the fact that a lot of conservatives smoke (smoking can even cause harm to nonsmokers who are unwilling breathers of the cancer - causing substance)? (firstthings.com)