Oh, wait, you're talking about spanking CHILDREN. Yeah, probably not the best idea.
Lol, I wasn't sure whether this was some kind of S&M thread either XD
I think smacking shouldn't be illegal but similarly it shouldn't be socially acceptable either. Someone using smacking as the only form of discipline against a child is of course not going to raise them well. But if itÃ¢â‚¬â„¢s used as part of a gradient, for instance, taking away their games console when they misbehave and only leaving smacking for very serious incidents that put themselves or others in serious danger e.g. running across the road or hitting their friend across the face with a stick.
Hitting with objects, across the head or hitting a child extremely hard is, I believe, already a criminal offence and I don't think there need to be any changes.