Booked my bro in law and his wife and 2 kids (5&2) with avios. On return trip from LGA to ORD, AA could/would not seat all 4 of them together. Initially all 4 were separate, but after they fought, they managed to get each parent next to one child, but many rows apart. There were empty seats on the plane.
Anything they can get? Who should they complain to?