It was scummy, because naturally it will always cause tension. I feel the right way would have been to approach us. Instead they approach the child who will always click freedom. They also sent us parents an email letting us know she's free to do as she wishes and we're SOL.
We told her she could stay under Family Link, or else buy her own phone and service. That seems effective.
Sorry Google, I'll decide my childrens' internet access. Not your giant advertising machine.