Some have pretty horrendous management.
This classroom is my only personal workspace in the building. The kids yelling and screaming in the other classes taking place while I work here make me feel like 1) it's my responsibility to stop it or 2) it's out of my control.
I always ask politely if they can lower their voices so I can work. Sometimes it works, sometimes it doesn't.
It should work 100% of the time.
Come on teachers. Up on the defense. Learn how to manage a class. I shouldn't have to be responsible for telling YOUR class to quiet down. I should have a place to work where kids are yelling, screaming, cursing, getting up out of their seats whenever they want, or straight up getting ghetto. It's not their fault. It's yours.