Okay... First off, you've got a biased poll. That won't yield any good results.
Secondly, corporeal punishment is a bad idea. In fact, any aversive behavior training is a bad idea. A) You are harming your kid, so why would you want to do that anyway? B) According to studies, it can cause just the opposite in behavior and have bad effects on the child's mental state. C) According to the leading behaviorists in both child psychology and behaviorism (Google BF Skinner if you want to know more) shows that positive reinforcement works better than aversive punishment and has a negligible chance of causing any kind of mental instability.
People who say that they want to be able to hit their kids either have violent tendencies (most likely from being hit as a kid themselves) or think that because they got hit as a kid, they have the right to do it to theirs.
Nam Myōhō Renge Kyō[/CENTER]