It's just like it is with police officers - I would advise a child of mine to de-plane if ordered to by the airline, less you get the snot beat out of you. She is clearly resisting, and perhaps rightfully so, but risking your life, especially if pregnant, isn't worth the fight. I saw two people ordered off the plane last year on two separate circumstances. The second time, it happened so quietly (and it was Southwest, btw) that they guy who was removed, his father, busy talking to his seatmate, didn't even realize he was gone until right before takeoff. For being drunk. So it happens far more than we realize, only it usually doesn't result in a scene.