Unfortunately, I'd be willing to bet another court backs all that crap up. And again, unfortunately, something that more than likely started off with the best of intentions ran into the mindless, uncaring bureaucracy. The idea being to protect the rights of the children.
In practice, it's like dealing with the Gestapo. Any good they do is always tainted by that.
The bottom line in this case is the judge's ruling, by law, was not illegal. He in fact handed out the max sentence allowable by law. Now I'm not buying this "the father made a promise" junk. He was given an edict, period.
You are trying to argue a legal ruling against "common knowledge." Anyone with common sense knows the double standard exists, but the argument will always boil down to "put them in time out, it works." "No legislation has taken away your rights to punish." No, they just take away the means to enforce punishment, and if the child calls CPS on you, you have to prove your innocence to the court, as you already pointed out.
What do you do to force a 16 years old to do anything if they just don't give a shit? Nothing. You can't.
Further, I think making ANYONE's punishment/freedom contingent on someone else COMPLETING something is absurd.
Basically, the way I read it, you can go to high school in Ohio until you're 18, not complete it, and nobody gives a shit. But drop out when your 16, you HAVE TO take and pass the GED test or your parent goes to jail. That's just stupid.