Reminded me of the F-16 Pilots that were hopped up on amphetamines and thought they were getting shot at from the ground. Ultimately, they fired back, and it was their friendlies.
My only issue I've ever had was asthma. I have never been hospitalized for it and it very rarely effects me. I feel I can be honest about that and be fine.
The pilots in the article were taking pain killers. I wonder what they were ailing from. I took pain killers when I had my wisdom teeth pulled and I couldn't even stand up, let alone fly a plane.
Maybe in their eyes flying was worth dying for. Sad stories.