This is just my opinion......so please......take what you like and disregard the rest.
I understand your frustration and why you are upset with the situation. I truly do. But I don't understand how or why RAGF is oblibligated to advise you of RAS's activities. She didn't break the rules, your son broke the rules. It sounds as though the wrong person is being held accountable for the activity. Your son put her in a very awkward position. She was damned if she did and damned if she didn't. Lose lose.
The "perpetrator" in the scenario as I see it......is your son.
Now if she was using with him......that's a whole different scenario.
gentle hugs
ke