When someone comes up with a product or service that puts an end to bullying they will make a killing.
Agreed. Whatever the solution is; I'm 100% sure the answer is possible with smartphone Apps and their attached cameras... It HAS to be a matter of policy change and proof of bullying... Because no kid can be trusted to carry around a can of mace or taser or the like.
So it'll take a few more years, a few more famous youtube fights, and a smart app programmer. -And perhaps something like a worldwide Bully DataBase site where employers and child services workers can go check to see if anyone's gotten too many bullying complaints and watch the attached youtube films to judge severity.