I've heard a few stories from my old school of teachers (mostly, if not all female) bursting in to tears in front of the class.
Then they make the fatal mistake of asking the class, "why do you hate me?" It's about that stage when you lose the teaching game and you get absolute arseholes from the students.
There was this kid acting like a shithead in class one time, and the teacher, who is a brilliant cricket player, clocked him in the head from range with a whiteboard marker. Teacher got stood down. Totally worth it though.
Personally, I'm not a massive fan of trying to ruin teacher's lives. Especially considering that they're being paid to improve yours. If you're just gonna piss around your time at school you might as well do the people there a favour and not go to school, ever. Especially if you're around 15-18 and grades actually count for something. I'm no teachers pet or academic by any means, but that's just my opinions looking back. Maybe I had to leave school to see it.