Well... I can't say the teacher is good. He had his circumstances and I'd say he is entitled to his revenge, but I'm slightly against enforcing your revenge through innocent people (but it's not like I wouldn't do the same in certain situations.) Though unless he wants to be seen by everyone as the poor good guy that got bullied, I'm fine with it. If he isn't delusional and thinks he is a good person, I don't mind, but I don't like hypocrates :)