"as to the 5 no shows... airlines try to overbook every flight by 15-20% because statistics show that about that number of pax will not board for whatever reason, stuck in traffic, slept in, denied boarding, forgot passport"
I think you are missing the point. Their bags were already checked and on board but removed by MH before the aircraft departed. So it is highly relevant to ask who were they? Did they ever show to collect the bags? What was in the bags?