In the past for a game-modding project we sort of opensourced reports. Users (meeting certain criteria) could visit a page and view 5 seconds of video and statistics of an alleged/detected cheater. Then select positive/negative/inconclusive. If (IIRC 5 users) had voted and the majority said positive/negative then a ban/unban would be issued. Because it was random reports and the usernames were hidden, there were no obvious bias.