Yeah, that's how that works in public schools.This is easy, @snarlcakes says he(?) is a teacher who never has to worry about those types bugging him. I am not a teacher but I can take a wild guess about how he manages that: he doesn't talk about sexuality in class, he sticks to the curriculum, doesn't share his political opinions with them, and teaches from a position of benevolent authority as opposed to being their friend.
How close am I?
Edit to add: In my experience the vast majority of teachers do this by the way. If the minority that feel the need to act otherwise would knock it off, the M4L types would mostly go away.
Well, my best teacher was a world history teacher who didn't really stick to the curriculum, and we learned a hell of a lot more. Toughest class I took.