My father has alzheimer's which wasn't too bad, the first time, from a smaller station, GRR. The second trip went through DTW, which was an unmitigated disaster. First he walks and responds slowly to nearly everything, and they don't like that. This was in the pre-snatch'n'grab days, but I know if that had happened, someone would have been brained with a cane. People who were born early in the 20th century just don't cotton to strangers taking indecent liberties.
For subsquent visits, I decided it was not worth the chance. He doesn't travel by commercial air any more. I go and get him, and take him home when he's ready to go home.