I think knees to the head are needed in the kick boxing ring, this stops as I have seen guys and girls dropping there head down in the grapple and thus stopping the grapple.

But some of the first fighters e.g. new fighters were doing just this and getting nailed to bits, sure good to watch but guys may lose heart and stop in the sport, this may be a good or bad thing since as stated already the men are sorted out from the boys. Sure only one fight was stopped by a head knee, but that fight should have been full rules anyway, it was that alot of the first undercard fights the decisive weapon was the head knee and the receiving fighter was just not prepared for it. This may be show that we must start train fighters to train/spa with head knees.