In one American school all the kids knew only two letters and a number. AR-15
Are you making fun of school shootings?
It's a joke. Calm down.
Senseless murder isn't funny. I don't think you'd find it too kind if someone laughed at a tragedy that affected you, so please don't minimize murder with jokes.
Dude, it was a joke.
Joking about child deaths on schools is demented. Don't do that.