My favorite English teacher got sacked after someone complained about him joking to people that he heard voices in his head (He used to put the speaker wire to his head so it made crackling noises, grin and go "The voices in my head..." ) and showing us pictures of his patio and saying that was where he buried his wife. I didn't learn a lot from him, but he was very funny. He used to run through the classroom with his arms outstretched screaming and pretend to be drunk as well, but he was actually really nice.
We had a fire a couple of years ago due to the electrics, so had the afternoon off lessons and got to leave early. The school over the road heard about us getting out of lessons and therefore three pupils actually set fire to their own school, I think in hopes that they would get out of lessons as well.