Some Türk at my old school jokingly said "I'm going to drop a bomb on this school" when he got back his exam and was upset about a bad grade. He was a rather socially popular and connected guy and known as a memester/class clown, yet somebody got scared and reported it and the next day the headteacher came and pulled him out in the middle of class lol
No I think he just got expelled for a couple of days and had to convince the administration that he wasn't being serious. This was like 10 years ago around the time of a major school shooting habbening in Germany