With a holster like that where one has to thread a lock through it, it's no wonder that an AD occured.

Better still, let's say you're a terrorist. You now know that pilots are locking their weapons at certain points. "Wow, this is great," the terrorists are saying, "now we know when to strike."

If you're going to trust a man's judgement when he's carrying a loaded firearm on a plane, why would you not trust his judgement when getting on and off the plane? Completely assinine.