I was spanked and I have never hit anyone - classmate, stranger or my children. I don't think you should speak in such absolutes.
I was also spanked as a child, and wacked with a belt across my behind on a few occasions. I never felt abused, and I loved my dad very much even though he was a spanker, but the FEAR of it coming was horrendous. I knew in my heart way back then that I'd never spank my children, and I never did. I always remained calm when they were misbehaving, and found other ways of disciplining them. My DH spanked my son once, and I told him he'd better NEVER do that again. And he didn't. My kids turned out fine, and I turned out fine.