Discussion are good too.
Even if it just makes people reinforce the boundries by saying that's going too far.
I'm not over keen on hitting children mainly because I don't think it would be acceptable if done to me.
Variations of "You've got to because that's the only way they understand" used to be justification for wife beating.
When it comes down to hitting children (Or anyone else for that matter) I do feel it's rather better if we don't.
Anyway psychological cruelty is so much more effective
