A ban is the denial of a person or group's access to a service or resource. Bans are typically enacted by people in positions of authority in response to rule violations committed by an individual. The ability to ban is sometimes satirically referred to as "the banhammer. In the Halo community, bans are administered by Bungie staff members when users break the rules for in-game conduct.
Here's how you'll get banned in Halo 5: Guardians - Polygon
Halo 3 is a first-person shooter game developed by Bungie for the Xbox console. The third installment in the Halo franchise , the game concludes the story arc begun in 's Halo: Combat Evolved and continued in 's Halo 2. Halo 3 ' s story centers on the interstellar war between twenty-sixth century humanity, a collection of alien races known as the Covenant , and the alien parasite Flood. The player assumes the role of the Master Chief , a cybernetically enhanced supersoldier, as he battles the Covenant and the Flood. The game features vehicles, weapons, and gameplay elements not present in previous titles of the series, as well as the addition of saved gameplay films, file sharing, and the Forge map editor—a utility which allows the player to perform modifications to multiplayer levels.