As has previously been mentioned, if you think any of your opponents are using disallowed resources, you should report them via their profile.
https://support.chess.com/en/articles/8562517-how-do-i-report-someone
Publicly accusing other members is not allowed by the site TOS and posting guidelines.
I always scan my opponent and people and modo who think we can't get the IP, just evolve and out of your cavern. 90's years is over.
So today, each players below use stockfish during 3 until 7 moves during the game. The system doesn't know see that, then no catched and no banned (i tried and sent the video but they see nothing...) :
[public accusations are not allowed -- MS]
[removed] use stockfish and chessot on lichess too.