Random Thought: Glee - Does No One Know How To Close a Door?

I was watching the Guilty Pleasures episode of Glee last night, and I noticed something odd (it's Glee, there are a lot of odd things to notice) - the doors to the choir room are always open. Always. How is that acceptable in a school? Why do we need to see students walking outside the door? Is it to remind us that they are at a school? I would think the choir room would be enough for that. And where the heck is Sue Sylvester yelling at them to keep their infernal racket down? 



To be fair, for this performance they were coming from outside, but look at other performances. The doors are always open. I can suspend belief for many things but I find this one a little hard to swallow.