Abuse comes. As Christians, we cannot prevent it. But our response as Christians, can make all the difference in the world.
John Piper's response to tragedy is, in itself, tragic. All he can point to is that God rules and we drool. I can't argue with this fact. But his message is of no use to anyone. He could take a lesson from Wade Burleson who wrote a compassionate, open letter on his blog to a little girl who was sexually exploited by a man in Christian leadership.
Here is a link to what this letter has meant to the family of the abused little girl:
Tom White, Abuse, VOM, and the Power of the Internet
John Piper, if you are listening, and I'm sure you aren't but I have to say this anyway, please learn a lesson from Wade Burleson. You should be able to learn from him. He's a man and he's even a Calvinist. Please take note of what to do in crisis because you have shown so far that you have no clue.