If you have ever worked with runaway teens, then you know there are few controls on them.  They used to incarcerate runaway teens (who were jailed along with adult crimminals), but our jails are too full and all OCS juveniles have guardian ad litems, juvenile judges and regulations that oppose jail as not being the "least restrictive" environment for the minor.

While it is true that some good parent raise bad seeds, it is the exception rather than the rule.  Parents who raise disturbed kids more often than not have struggled as parents for many years.