What is the problem?
You were compensated fairly, you got to board the plane first, you "chose" to have your child sit IN FRONT of you (WTF?) and then got mad when you were escorted off the plane when the attendants asked to you get off the plane out of fairness to the other passengers? You had an opprotunity to console her, you just didn't DO it. Please.
Pressure changes can be dealt with by chewing gum, sucking a lollipop.
I have an 8 year old, and she KNOWS better, but when she flies, I am sure to pack her a goodie bag of stuff to do and play with so that she gets in her seat, next to her dad and is a model passenger.
GTFOOHWTM!!