In Real life, Teachers or other adults doesn't even TRY to do anything when they see this kind of shit going on. Most of the time they just turn their backs on the whole thing, usually out of fear of the bully or simply because they didn't care enough to get involved.
As a real life teacher I'll call you on this. I've never turned my back on bullying in my class. I've bever known a teacher I've worked with to do so either. Certainly there must be teachers somewhere who don't care enough to intervene, but it's absolutely not the common place occurance you make it out to be.