My school implemented a "one way" rule in the hallways. The problem is, each grade level is on their own sort of loop, with bathrooms and closets in the middle. So, if you have two classes next to each other, you will get yelled at by a woman who's job is to harrass you about why you have no life plans if you don't walk all the way around.
They also closed the 2nd-3rd floor segment of one of the staircases, so now everybody coming and going from the 3rd floor has to use one staircase, in addition to the people using that staircase because it's closer.
We live in fear of the fire marshal.