In the decades I have been a parent, there has never been a single situation where striking the child would have in any way improved the situation. Anyone who's child has got to the point where they cannot be stopped from doing something without physically striking them is frankly a failure as a parent. People, just give your children the same level of respect you would a person on the street. i.e don't hit them. I don't know why I have even bothered to reply, this thread shouldn't even exist. It's been 12 years, let it go.
To be fair, decades of parenting or otherwise, that is a very easy statement to make when you've only raised your own children. Different methods of discipline work to varying degrees on different people, and I think its very naive to think that some children wouldn't respond best to being smacked on the bum in a controlled manner.