https://support.chess.com/article/648-what-do-i-need-to-know-about-fair-play-on-chess-com
Publicly accusing other members of potential cheating is not allowed and you should use the option on their profile to report. The site does close tens of thousands of accounts a month for fair play violations.
https://www.chess.com/article/view/chesscom-update-november#FairPlay
Here's a recent article about Fair Play and the incidence on site:
https://www.chess.com/article/view/online-chess-cheating
That all said, discussions of cheating, potential cheating, or cheat detection are not allowed in the general forums.
Chess.com stopped to fight against cheaters because of the bugs with the servers?
Here are some obvious cheaters:
[removed -- MS] 171w 10l
[removed -- MS] 60w 10l
[removed -- MS] 79w 30l
[removed -- MS] 204w 25l
I could continue but I'm done with Blitz and chess for the time being. I love this game and working hard to improve. But it'salways the same. I manage to reach my peak blitz rating. Then I lose againse one, two, three cheaters. Then I play against fair opponents and I'm tilted. I never see my points again, I close my account and stop chess.
I hope you will do something against them one day. I may look like an idiot. But I decided to dedicate my life to this game a few years ago when I started to play. But cheaters are destroying all my efforts days after days.
You have a wonderful website. But this is full of them. And it's just so easy to figure out they are cheating by looking at his profile. For now I will close my account but you can try to mail me if you want someone as a free mod to ban everyone with such stupid profiles who kill our game.
Have a nice continuation