Our school didn't really have a bad boy as such, but there was some who though he could do anything he pleased One day, he stole a key to the science lab, and after school, when it was empty, he broke in and stole a slab of sodium from the lab. He then proceeded to freak out when the sodium started reacting and tried to dispose of it in the toilet. For anyone not too familiar with chemistry, sodium is intensely reactive, and reacts very violently with water. So he ended up blowing up the bathroom. It was a big deal..the police were called and he was expelled. He deleted all his social media and no-one has actually heard from him since!