I dont think you should have to justify your method of discipline, whether it is smacking a child or sitting them in a corner. As long as they are getting disciplined when they are doing something wrong. If the method of none/little discipline is taken they generally turn out to be teenagers and adults that have no respect for their elders/authority. Being my age I have grown up with people in both boats and have seen the difference.

As much as some people say smacking your child,is illegal, it is not. As long as you are not beating your child(my mum is a cop & I made her look it up)

Im sorry if I have offended anyone, this is just my opinion.