One thing that needs to be emphasized in these debates is not only the effect on the children, but the effect on society as a whole of allowing parents to shelter their children and indoctrinate them with a worldview. It seems that while indoctrinating children in creationism, for example, does positive harm to the children, it also does positive harm to society as a whole. Not the current society, rather the future society! If there are many such children, their presence in society might well constitute a kind of demographic social pollution: scientific illiteracy (or illiteracy in general) will be a huge social problem if it afflicts a large percentage of the adults in a society. And the children of today are the adults of tomorrow, and we owe it to the future society to make sure that demographic pollution of that kind does not take place, because it affects everyone in society, including ourselves in our old age.