"...of the 3,009 flight segments Dad booked for himself from May 2005 to December 2008, he either canceled or was considered a “no-show” for 84 percent of those reservations. During the same time period, he booked 2,648 flight segments for travel companions, and 2,269 were either canceled or a no-show."
Booked 3,009 flight segments in ~42 months. That's 17 flights a week, or 2.4 a day. He was basically using the companion pass to reserve empty seats.
Did American screw up by not having better usage guidelines? Yes. Did this guy take clear advantage of this program with bad faith? Yes.