Cherry on the pie from nogreaterjoy

The child has no social consciousness, so he does whatever he feels like. Dumping it is not a great offense for a six-month-old, but he will not always be six months old, and it won’t be cute for long. It will make you downright mad when he is three years old and flings a whole plate of food into your lap.

So we watch him, knowing his propensity to selfish compulsion. When he seizes his bowl with intentions of dumping it, swat the offending hand with a little instrument (light wooden spoon, rubber spatula, flexible tubing less than a quarter inch in diameter, or any instrument that will cause an unpleasant sting without leaving any marks). As you swat the offending hand, say “No” in a normal commanding voice. The tone is more important than the word―not angry―but decisive. Children understand the temperament in your tone before they are born, and will recognize it. This swat is not punishment. Probably, it will not even cause the little guy to cry. He will be shocked and stop any action in which he is engaged. Explain to him that he is not to throw his food onto the floor. If he again makes an attempt, swat his hand again and say, no. The third time is the charm. He now knows that “No” uttered in a commanding tone, is something serious. He will not try that stunt again—at least not for this meal.

I find the above horrible. The one who the child expects to love and cherish him is hurting him, if not physically, at least mentally, that is just plain abusive.
I cannot understand people recommending parenting like that.