Imagine you have a private server where everyone is required to show ID and prove they're over 30 before joining and profanity is explicitly allowed. Maybe it started with a small group of friends and then expanded to include friends-of-friends, so there are some people who don't know each other IRL. With this new change, player A could get mad at player B. Player A then waits for player B to send a totally-inoffensive message that includes profanity (ex: "holy shit the new house you build it awesome") and report it. Because of this new system, player B now gets banned from playing multiplayer Minecraft despite properly tailoring their language to the server they're playing on.