Is every post from this point on by a particular user to be ignored, even if there is a complete turn-around in behavior? That seems to be the suggestion being made. "Discipline" without the potential of rewarding good behavior seems to me to be vindictive and at odds with a monastic ethos of self improvement.
I would agree that responding to obviously trollish posts is counterproductive and probably even detrimental to the overall health of the monastery, but I would also suggest that a 100% blackout is as well.