I for one am not comfortable with the idea of having to wait until they hurt a child before we do anything. It is better if we are proactive with these guys and flush them out before they actually hurt a child. Again I will say that the techniques used in this case are questionable and should be evaluated to see if there is better way to go about it.
Once a child is violated you can never put their world back together again. Not the way it was before. Being proactive is a necessity.