That's why I mentioned preventative measures for false accusations. For example, there could either be staff or players reviewing videos from the match where the player was accused. In order to encourage people to spend their time reviewing cases, XP or other rewards could be given out. I understand that reporting systems can be abused, but there are preventative measures that can be taken to minimalize false reports. Also, the punishment for teamkilling, griefing, and other trolling does not have to be a permanent ban. Possible punishments include 30 minutes to week long bans, based on the number and severity of the offenses.