I never could stand teachers like that when I was in HS. What would be the huge deal about letting someone step out to blow their nose? Geez.

And I always hated how some totally forbid students to step out and use the restroom or get a drink in class. I mean if someone did it every single day, I could see talking to that student about it, but really, how are you supposed to concentrate in class when you really have to go, or are really thirsty?