Ban appeal denied because apparently third-person is a third-party program or software? Can someone explain how using third person is a third party software?

Steam Name: Unverified SteamID: 76561198105218374 Name of the Admin you were banned by: Kappatalist How long is the ban for?: 7 days The reason you were banned?: Abusing third person to look through the street Why do you wish to be unbanned?: I originally ran from the OTA on the streets...