So many ignorant people out there seem to forget about discipline, and frankly it is a way of life that is dying. My father beat me ONCE! and that is when I was being a little shit and threw a hard plastic flashlight at my sick sleeping brothers head. He had only one thing to do, and that was to enforce physical dominance with a swift stroke of the hand across my ass cheeck, telling me one thing, "What the hell were you thinking when you harmed your brother?!". A child who gets away with throwing a flightlight at his brothers head, and only gets a 'stern' talking too of "now you know chase... that wasn't fair too your brother that you threw that flashlight, he doesn't feel that great that you threw it... m'kay". The parent who did not show phsyical dominance at a younger age, has shown that they are not worthy of any respect, and thus cannot crontrol the individual in general (This is because at such a young age, children will only ever understand the pysical aspect of life, and anyone who tells you otherwise is lying about just how smart children are, I know because I WAS ONE).
In short? Discipline is needed when its needed, and I won't have an unrespected parent who can't handle their own children tell me otherwise! The only way that they could ever control their children is use of mental trauma or use of hormones to keep the child more calm (Which is extreme but you would have to be one sick bastard to try and use that method), now which is more worse for the child over all OP? The Immidiate Discipline method, which actually has results, and has a better turn out of grown up adults (With the side turn-out of adults who assume it was child abuse because people like you say it was), or the "Talk to their child" Method, which has the largest turnout of twats out there, and god knows we don't want anymore of those.
I am not saying Child Abuse doesn't exist, but don't for a second believe that the Disciplinary Method of raising a child has anything to do with a child abuse. No true parent enjoys hitting their child, for every true parent has what is called unconditional love. They would never be able to harm their loved ones (out of hate) without harming theirselves first.
And just for peoples information, yes, I was raised with the Discplinary Method, and when used correctly, and if the child is smart enough, they only get taught a lesson 'once', so that isn't Child Abuse... I think I have made my case in that regard.