Proposal to outlaw smacking kids in Scotland, what do you think?

Section 43 of the Criminal Code of Canada allows the use of some physical force if the purpose is for disciplining a child under the age of 18. Only parents or people who are in the place of a parent (for example, a step-parent) can be excused if they use reasonable force on a child for discipline, so if you give your child a spanking within reasonable force , I guess if you leave a bruise or mark that's excessive force.