Those intelligent humans are the other players reporting the griefer. In the case of LoL this might even be done by enemy players as well in particularly annoyi

Those intelligent humans are the other players reporting the griefer. In the case of LoL this might even be done by enemy players as well in particularly annoying cases. When a player gets daily reports for half a week that means dozens of players looked at multiple games and decided something's wrong. No need to have someone manually review games by default.