Sometimes the children are taken away by force. Terrocrats raid private businesses at gunpoint, terrorize innocent people, rob them of their records, equipment, and money - smashing their businesses. All humans are free and sovereign by nature. Most people are blind to subtle coercion. Because so long as you always obey others, you may never notice when someone is coercing you - it may all seem perfectly normal and acceptable.
Few people recognize that forcing children into schools is coercion.
Many parents don't recognize the coercion they perpetrate against their own children as coercion or violence. Children must obey their parents because their parents are big, strong, and violent. Voluntary co-operation is the essence of a free society. How I Found Freedom in an Unfree World by Harry Browne, and The Discovery of Freedom by Rose Wilder Lane. Consider that it might be a basic principle that freedom and coercion are incompatible .