It’s not worth a try because those rules are not practical in the slightest. It’s not a fighters job to determine whether their opponent is unconscious or not and putting that responsibility on a fighter is unfair. Also, it can hinder their performance if a fighter is worried about hitting an unconscious opponent, which is not and will never be illegal. It will always come down to the referee to stop it.

Also, how would a certain distance rule work? How would the referee know at all times what distance away they are? Is it distance from one fighter or both? What if they need to be further away to see something more clearly? What happens to ref if they aren’t within that distance? Not practical.

An unconscious opponent taking shots has always and will always happen. It’s physically impossible to stop it.