I sincerely doubt that child was "slapped" around. The parents are damned if they do and damned if they don't. If they don't discipline a screaming child (not an infant, mind you) on a crowded airplane, everyone is angry at them. If they do, they have the police called on them and their child kidnapped by a flight attendant.
I stand by my comment. So you can just feel free to kiss old Fred because I don't really give a damn what you think.