The end of compulsory schooling (whether that compulsion comes from parents or from the state), will one day solve this problem. Bullying occurs wherever freedom of association is denied.
A zero-tolerance approach to bullying has about as much chance of working as the War on Drugs. Headteachers and schools always deny serious bullying where it exists.
And minor bullying is indistinguishable from 'socialization', which nearly everyone thinks is a good thing.