What to do--laugh or be angry?

So Jake came home from school today and said he got in a "bit" of trouble in science today. This is quite common for Jake in this particular class, he gets pretty bored and his teacher doesn't appreciate his humor & jokes, which seem to multiply when his work is all done. Anyway, the apple doesn't fall far from the tree, the teacher's daughter was substituting today and Jake had a little run in with her. He was once again done with his work and just wandering about the class. He went to throw something away and saw a substitute teacher badge that subs are required to wear sitting on top of the pile of trash. He pulled it out of the trash, crossed out "substitute teacher", wrote his name, and then below his name wrote "anarchist", and then put it on and proceeded to walk about the class. The substitute/daughter saw him and yelled, "What do you have on?!!!" "Why do you have that on?!!!" "You need to throw that away!!!" But then she decided to do it for him and pulled it off his neck and took it. Jake being Jake, thought the whole thing was very funny. I really wanted to be upset, but I bet you're laughing too. Hard not to. What to do?!!!