AFAIK there has not been a single pilot charged with threat of domestic terrorism at a KCM checkpoint. Sure there have been rule violations (taking your wife's bag through KCM on a vacation, forgetting a gun was in your bag, maybe even carrying a kilo of coke.....). However, (again AFAIK) none of these were a risk to the passengers, because: if we want to do something we can do it already without our bag or uniform, because we are in the cockpit already. We need to keep pushing for KCM for cockpit crew (and yes, cabin is different) without the restrictions currently imposed.