Surely blame can also be laid at the door of the bean counters. They eternal search for cheaper turnrounds by the carriers pressures the handling agents to cut costs and therefore employ less qualified people. We had a 747 cowl pierced at Manchester UK while parked and it was only spotted during the walkround. No-one ever put their hand up to admit blame or seemed bothered that they had risked 450+ lives on the vigilence of the guy doing the walkround.