What? Now, in addition to invasive searches, confiscation of personal property, credit checks and God knows what else, you would have passengers have to produce their medical records, too? Well, call me silly, but I have a better plan. If I can't drive or walk, I'll stay home. I don't need to get anywhere bad enough to put up with all that.
If you have a family member that is mentally unpredictable you might want to let someone know if you have to put them on a plane.