What was the most annoying thing a teacher ever made you do?

Last year we had these ignment notebook things which we recorded ignments, tests etc. in and I colored in mine, which should be none of the teacher's buisness, right? Wrong. My homeroom teacher always checked ours and he would lecture me about coloring in mine, what's the big deal about it I don't know. Or he would lecture me for not writing what we had in cles when we DIDN'T HAVE HOMEWORK. He wanted us to write down what we did in cl. It was somewhat pointless. And I colored my entire notebook at the beginning of the year, so it wasn't like I could suddenly change it. Lol.