So first, alter server state before transmission by spawning hallucinations (human-like bots) in places not visible to human players (inside walls, unusual angles, far in the horizon). To the client, they all look like human players. At least in memory.<p>The players who react or interact with these hallucinations are likely cheating.<p>This flips the roles, and the hard task of correctly determining "human like" behaviour is now on the cheaters.