No hats
No backpacks in glass. I mean, you could be storing a bomb or weapon in yours! If someone really wanted to shoot up the school, not being able to bring their backpacks to class isn't going to stop them.
No cellphones/iPods/electronic devices. I can understand being required to have your cellphone turned off or have the ring set to silent or vibrate (although I've seen situations where the teachers would hear the phone vibrate and, despite how quiet and non-interruptive it is, still take it away). And you aren't even allowed to use your phone or mp3 player during lunch break.
No holes in pants, even if the holes are below your knees. I mean, I can understand prohibiting holes that are higher up on your pants, like when they reveal your underwear, but any hole, anywhere? I've seen people get sent to the office for a change of clothes and punished for holes below their knees. All those kinds of holes are revealing is the same part of your leg that would be visible when wearing shorts.
No "open lunches." We used to be able to leave for lunch and eat somewhere else, or go outside and get some fresh air, but now we can't do any of that. Apparently when they let us do that, we were getting out of hand and were trashing up the parking lot. Sure, people do that, but it was never bad enough to warrant outright banning open lunch, and it's obvious that the real reason was that the school wanted to keep people in the school so they would buy lunch there and the school would make more money. I would be more understanding of this if the food in my school wasn't terrible.