At my school, if your shoes weren't pointy enough, you'd get suspended.
If you weren't wearing full uniform at all times, (shirt, tie, blazer, dress shoes), you'd get suspended.
Also, you weren't allowed to go to the bathroom during class AT ALL, no matter the circumstances.
It wasn't even a private school or anything, it was a public high school packed with junkies and neds. God only knows why they were so unnecessarily strict with their rules. Additionally, if you were to fail even one of the preliminary exams before your finals, you would get kicked off the class in which you failed the prelim. No excuses.
Safe to say, my school wasn't the best.