Zero tolerance laws are bullshit. I shouldn't have to get written permission from my parents, my doctor, the school nurse, and all the king's men just to bring some gelcap Advil to school. What the fuck do they think I'll use it for, anyway? Do people get high off of Advil now? Is this a thing?
Also, I remember that in elementary school I used to play "war" with this boy who was a Civil War enthusiast. When the teachers found out what we were playing, they always told us to stop because "pointing and pretend-shooting at people is not allowed."
So later we started to play Harry Potter, and we'd pick up sticks (they were more like twigs really) from around the school and point them at each other as we cast spells. Apparently this is also unacceptable because twigs are dangerous, so they told us to throw away the wands. Finally we just cut up strips of printer paper and colored them brown, and they were okay with this. But they still didn't want us to point them at each other.
In junior high, a kid was sent home for wearing a "Guns & Roses" tee shirt.