Parental Control over iMessage?

I have been searching, in vain, for a way to control the iMessages coming in and out of my daughter's iPhone 4S. These forums say you need either Wifi or a cellular data/phone plan to send iMessages. They say you use either your AppleID, an email address associated with your AppleID or a phone number to register for and use iMessage. I am here to tell you that this is all bogus.

So far, I have suspended all cell services to the phone, changed the password for our wireless network in our home and verified that no other neighbors have unprotected Wifi. I have changed the password to her AppleID account and deleted the email associated with iMessage (Gmail) from her AppleID. In fact, I have done everything I can think of barring taking the phone and either forcibly removing the passcode, thereby wiping the phone, or running over it with the car.

The punchline to all this....iMessage is STILL working just fine. I have GOT to get this situation under control. As parents these days, we are often held socially and criminally liable for the actions of our children. Also, monitoring messaging is imperative in protecting our children from bad things/people. So, things like this iMessaging system on her phone have GOT to have parental controls that can be accessed from outside the phone. It simply isn't worth a WWE session to get physical control of the phone. I am getting too old for that garbage.

Please tell me, preferably in a non-snarky way, how to stop these messages from working without violence of some sort. If there is no solution, please program one. Thank you.