Combative? I gave you an honest, thoughtful answer.
I think unschooling makes a lot of people very uncomfortable, as it goes against what conventional wisdom tells us. That kids can grow up and become productive members of society WITHOUT school. Without honors. Without transcripts. It means that what you've been taught and believe isn't 100% correct.
Unschooling challenges people's beliefs. I doubt no matter what I or any other unschoolers say on this board will change anyone's mind here. But I'm sure we'll make you think. :)