Social and moral tinkerers- the altruistic- seem to not realize that while their intentions may be good- they come with unforeseen consequences and pitfalls.

Leave the people alone to work within the constraints established by the law and social tradition, and most people will conform. We will always have bad with the good, but the trade-off is that most people adhere to the law and live their lives well enough within the constraints of social traditions, that trying to impose something else upon them is more damaging than what we already have.