I think that you should avoid violence whenever possible, but sometimes, a kid just needs a spanking. But you can't be nice, it has to be a traumatic experience and if done right, it will really teach your kid right from wrong. But if you are fast to violence, (spanking), then they will not learn their lesson and just think that you hate them. You can never do it out of emotions, you can only result to it as a consequence of their actions. But time-outs are good too.