Minecraft wiki entry for Chunk_ban, associated text: Chunk bans are mainly used in anarchy servers, prisons and safe houses to keep people out of certain places. The first reference of a chunk ban was the furnace chunk ban in 2b2t, and the first non-anarchy reference was in a prison called The Obelisk by Miningblob. Ever since then several prisons and safe houses have been made with dropped shulker box area bans, most notably Gaia's Vault by SeenSven+TheDeafCreeper and Wifies' safe house.