I did, I said that the punishment system varies from parent to parent. No parent is the same, some believe in spanking their child, some believe in locking their child in their bedroom for 3 days, some in banning them from their PC for a week, some believe in...I could go on. It also depends on what they did. Let's say a child went on Facebook and posted "I hate niggers and Jews", the parent would, in all probability, ban them from using Facebook. I mean they might get a beating, but the banning from FB would be the primary punishment.
So there's no right or wrong way of punishing a child, because it varies from parent to parent.
Now on punishments. I don't condone violent beatings towards a child and I also believe that a child should be encouraged to do good thing, I'm not talking about bribes but something like "Oh that's a good thing you did, keep on with that". And the child would know right from wrong, but then we're entering into an entirely different debate.