It's bold but true. Did you know that Glocks with similar internal safties have the highest rate of accidental (read "negligent") discharge amongst the various police forces?
Partially this is because an awful lot of PD's use Glocks.
But to my knowledge, and I've done some research, they have never been able to prove a Glock went off for any other reason except that the trigger was pulled. Can't drop them and make them go off, can't stare hard at them and make them go off, can't shake them and make them go off..well, you get the idea.
Now, are you also aware that a significant percentage of ND's occur when a round is being chambered? Probably the most common action that generates an unintended discharge. Think about that.
I will however concede that even an HK with a self-aware, living firing pin cannot fire an empty chamber.
Now all you have to do is get the TSA to change the rules for the FFDO program and direct the pilots to carry empty-chambered pistols. Then when some looney crashes through the cockpit door and catches the guy frantically trying to chamber a round, we can change the rule back.