When my son was small, I was mortified if I thought he was disturbing others. I flew with him at 18 months and I still remember how awful it was. Looking back I realize he probably did not bother others as much as I thought. I was just so aware. lol
I also can understand that after 11 hours, no one was happy. The child may have been a bit annoying but, really, everyone needed to just get where they were going. The flight attendant interrupted that when she decided to claim a threat had been made.
I do not appreciate it if I have to deal with an active child on a plane. If it gets too much, I will just use my mp3 player or my laptop with headphones and ignore.
They used to have smoking sections in planes. I wish they would have family sections.
I have times in church where I would be silently freaking out about my children bothering everyone else. At the end of one service I turned around and apologized for their behavior. The lady I apologized to looked a little confused and said they had behaved very well. Apparently, I knew what they were thinking of doing so well and spending my time stopping it that I thought everyone else noticed too.