Hello, I’m Mr. Null. My Name Makes Me Invisible to Computers
10 years ago I worked for Jagex on RuneScape, an RPG. There are rules for that game about conduct and so on - no swearing, no scamming, blah blah. If you see someone doing something "bad" you can report them and the customer support team reviews the event and can allocate "black marks" on players who infringe.One particular user accumulated thousands of black marks. We thought they were doing something incredibly bad. A black mark gets you banned for a short period of time, this player was banned for a millennium. But they kept sending messages saying that it was unjust, they did nothing wrong.Turns out their playername was 'null' and half of other players' offences were attributed to them due to null in Java being cast to 'null' curing concatenation...