difficult one to answer this i have never personally smacked,slapped any of my kids(3) but im glad i didnt cos they are big lads now they might slap me,but when i was at school teachers were allowed to hit you be it slipper,cane,or my particular hatred when they used to pull you by the sides of your hair,also coppers could give you a cuff round the ear,but its all pc now,its not often im lost for words i just dont know tbh,maybe some kind of discipline,lines,detention,grounding,unplug their x boxes etc who knows?