When I was in high school, I once baked a batch of cookies to share with my school friends on April Fool’s Day. The expressions of disgust followed by intense delight when they realized I’d replaced the sugar with salt are fond memories I cherish to this day. Sometimes it’s just fun to mess with people, but not in a mean way, of course. It’s only fun if the person being pranked is cracking up along with you after the big reveal. One redditor recently asked the internet, «What are some harmless ways to f**k with people?» and the responses are absolutely hilarious.