who woulda thought?

I live in Tabor, Iowa, population oh roughly 1000 (on the generous side). Today the local school which has less then 600 students k-12, had a bomb threat. The only way I knew anything about it was I just happened to be going up to the school to take Bubba his glasses. Chick called me like 1/2 hour later to come get her from a church. The kids were evacuated to two local churches right before lunch. The kids that didn't get picked up had to return to the school and maintain their day. No one ever thinks that something like that will happen. Apparently it was written on a bathroom mirror so, kinda fishy. BUT what does it say that kids today think making these kind of threats is a joke?