The system primarily acts as an anti-piracy tool rather than a comprehensive anti-cheat. Common triggers include: Guide :: Cheater Tag Explanation - Steam Community
: If your name appears red to other players in-game, you are likely tagged. What Triggers the Cheater Tag? Payday 2 How To Know If You Have A Cheater Tag
: Teammates may see a red "CHEATER" label above your head or receive automated chat messages stating you are cheating. The system primarily acts as an anti-piracy tool