On a personal note, I was raised in a Christian Science family. While devout, my parents were very attentive and I was lucky to have a healthy childhood (though I didn't even try aspirin until I was in college). A philosophy degree at SFSU cured me of that dogma :) but that's part of why I'm sympathetic; I love my dad even if he is a radical.

I think parents still have a legal obligation to not be negligent. There's a difference between not providing any care (while playing WOW all day) and doing your Christian Scientist damnedest for your children. A person espouses civil libertarianism not because they hate government, but because they trust people and hold others to the personal commitments they make.