Does it annoy you are on a long flight and a child is being loud?

I don't mind children being loud because after all they are children but i was watching Dr. Phil and he had this guest who was a mother of a young boy and they had been at the airport for 11+ hours and were weary and tired, they finally get on the flight and her little boy is saying goodbye to the airport and everyone around him is laughing and joking, just as relieved to be off also. Than a flight attendant comes up to the mother and tells her to shut the baby up and mother can't believe what she's hearing, she asks jokingly "How am i supposed to do that?" and flight attendant says benidril or something, that med that drugs children to sleep...than they turned the plane around and kicked mother and child off. Do you think that is right?