Thanks for the replies guys, happy I finally got a thread with a good amount of posts.
With that being said, here's probably the worst thing that ever did happen at our school:
Back when I was in third grade, we all got brought outside cause the fire alarm went off. Since we were all in third grade, we all just assumed it was a monthly fire drill. While we were waiting outside in our usual positions, firetrucks and police cars roll up to the front of the school, and they run inside.
Some kid in 8th thought it was a magnificent idea to bring a few matches to school, throw a bunch of papers in one of the school's trashcans, and light the flame. He did end up starting a small fire, and the smoke was pretty noticeable, but no long term damage was done to the building itself since a few teachers were able to put it out before it spread. (Thanks, Mr. Walter)
Yes, he did get arrested and got expelled on the spot, which is the only case of somebody ever getting arrested at our school.