I was smacked by my parents as a child. Sometimes they would completely lose their shit and smack me over and over, whilst shouting at me. Each syllable would be a smack. I remember wanting my dm to stop talking, so that she would stop hitting me. I remember being in the street and my dm taking a swing at my arse, and I managed to move to dodge it.
I guess it stopped at the "appropriate" age. 10 or something.
I have never smacked my dc, and would use time outs to discipline them. My parents moved with the times and followed my lead. I forgive them, and they are very loving and supportive now. It's strange to think that happened now.