@Maniac - good for you. and I have raised two children that are polite to adults, are honor role students, they participate in athletics and other school activities, do community service, show no predisposition to drugs or other negative behavior (not saying they never will) and they were spanked. Oh...and they're quite attractive, too, which scares the h*** out of me.
Now clearly I am biased regarding my daughters. It is the consistent compliments from teachers, friends and strangers and convinces me I am correct in my assessment.
They do suck at doing housework and keeping their rooms clean, though...lol
So my point: Corporal punihment, correctly applied, does not harm. You choose to not do it, and instead used some sort of *mental* punishment, and want to pretend that that was somehow superior.
I would suggest to you that there are plenty of parents who do not spank, but instead shame and degrade their children to correct their behavior, which can be more damaging than a swat on the behind.
And for the record, not once have I ever "smacked" my children in anger with public, vocal threats. Those people should not be spanking. But....like I said, these are the same idiots that will (in the absence of spanking) degrade and humiliate their children and cause all sort of other harm to them.