During my junior year at high school, someone wrote a bomb threat as a joke on the stall. Suddenly every building entry had a backpack checking station you had

During my junior year at high school, someone wrote a bomb threat as a joke on the stall. Suddenly every building entry had a backpack checking station you had to go through. Every bathroom break was scrutinized and logged, and only one person was allowed in the bathroom at a time. Small school (my class had 36 kids or so) but it's a great example of one person ruining everything for everybody.