pitalism, it would be when:
http://tigerboard.com/boards/view.php?message=15483415
the child has his full rights of self-ownership when he demonstrates that he has them in nature — in short, when he leaves or "runs away" from home. Regardless of his age, we must grant to every child the absolute right to run away and to find new foster parents who will voluntarily adopt him, or to try to exist on his own. Parents may try to persuade the runaway child to return, but it is totally impermissible enslavement and an aggression upon his right of self-ownership for them to use force to compel him to return. The absolute right to run away is the child's ultimate expression of his right of self-ownership, regardless of age.