There was research on this published by Activision [1]. Spawning fake enemies behind the users back, inside walls, etc. The players who react to fake enemies s

There was research on this published by Activision [1]. Spawning fake enemies behind the users back, inside walls, etc. The players who react to fake enemies self-identify as cheaters. [1]: https://www.activision.com/cdn/research/hallucinations https://www.activision.com/cdn/research/hallucinations