Proposing a method to flag questionable results, allowing the record holder to correct, retract, or acknowledge the ranking based on honor system.
Would need a button or menu item on leaderboard rankings to say “this looks questionable”
Show a “?” badge next to the ranking if the athlete doesn’t respond. Maybe only if it’s questioned by more than one other person to prevent spamming, or possibly consider removal of the record beyond a given number of questions without a response.
Notify the record holder that there is a question, and allow them to correct or confirm it. Usually it’s a case of changing the wrong activity type.