The thing is.There’s no one size fits all approach.There’s no guide that suits all kids because they’re all different(it’d be so much easier if their was).They respond differently to different things,They have different innate temperaments.What works for some kids doesn’t for others.
I usually find that i’m scary enough without having to smack mine.Blackmail works well too
However if it works for some kids i’m not against it within reason obviously.