Peanut Butter Revenge
Reddit user benlara found a clever way to get his roommate to stop using his peanut butter. Unfortunately, for his roommate, it cost him more than a brand new jar of peanut butter.
“My roommate kept on grabbing my peanut butter without asking, so I bought a bottle of laxative and made sure all of it went into the jar. I locked the bathroom door when I left in the morning. He pooped on himself and all over his bed — it was so bad he had to buy a new one.”