We do not allow attempts to name and shame others on the forums, particularly because the information can be wrong due to a display bug. If you see suspicious behavior, report the player and leave it to the enforcement team to sort it out.
Continuing the discussion from Forza Code of Conduct :
Reporting
Below you’ll find details on how to report players and UGC content in our active Forza titles. Our players remaining active in policing our games and submitting tickets/reports when applicable is a tremendous help to keeping Forza a healthy place to play.
As a reminder however, any repetitive motion or spamming of tickets towards our Support team will be considered potential harassment of our support agents. Though this will initially be met with a warning, it could lead to more stringent enforcement action including a permanent suspension of the support site and creation of new tickets if the behavior is repeated.
Reporting Cheating & Unsportsmanlike Conduct
To report a player that you suspect of cheating or unsportsmanlike conduct, please create a ticket on our Forza.net Support Site, and the Forza Support & Safety team will investigate.
Please fill out the required form, especially include the player’s Gamertag, along with any screenshots/links/videos for evidence (this must be included for us to act).
To take a screenshot or video capture on Xbox: Press the Xbox button on your controller → Y for Screenshot or X for Video Capture
To take a screenshot or video capture on PC: Press Windows key + G to open the Game Bar and using the Capture widget select Screenshot or Video Capture. You can also customize key binds for recording in the Settings menu.
Reporting In-Game UGC (Vinyl Groups, Liveries, Photos, Blueprints)
To report inappropriate UGC, Select Creator Info → Report → Report Offensive Content → OK
For Auction House items: Select Auction Options → Report Auction → OK.
Reporting Xbox Live Profile Content
For reporting any inappropriate gamertags, gamerpics, abusive Xbox messages, and any other platform-wide features, select the user’s Gamertag in the Xbox menu → Report or block → Report → Select your reason.