It's hard for them to enforce it if the administration is not following through with consequences.
Again, teachers have more power than they exercise. They strike all the time for better pay, days off, etc, and there's no reason why they couldn't strike for safer working conditions and empowerment when dealing with problem students and their low rent parents. Most of them are indoctrinated liberals, however, so it doesn't occur to them to do that when many times it means non-white students will get the boot.
Why don't you come into the schools and stop the bullying since you are apparently the only one that knows how to do that?
Are you kidding? I could walk in there and stop that #### within a week. School superintendents could stop it if they wanted to; they just don't want to. And teachers won't make them.
Shouldn't parents be held accountable instead of saying "Not my kid."?
Sure, but what if they won't? Then what? Typically this is where consequences come into play. Boot the kid, call the cops if need be, and stand your ground. That's how it works in every other venue....except for school.