Comment Re:Ummmm ... duh? (Score 1) 385
And, of course, we can construct the scenario in which the co-pilot and one of the cabin crew conspires
If the probability of a suicidal crew member is one in a million, then the probably of two is one in a trillion. That is close enough to zero that it doesn't matter. The plane would be more likely to be hit by a meteor.
There's really no way you can 100% prevent this kind of thing.
No rational person is expecting 100% perfection. But there are about a half dozen incidents that appear to be intentional crashes by the flight crew. So these incidents are roughly as common as terrorism. We are spending billions to keep terrorists from crashing planes. We are spending $0 to keep pilots from crashing planes. That is not sensible.