Minecraft wiki entry for Spawn_jail, associated text: New arrivals spawn inside the box and cannot escape until released by an operator. If there are no operators or administrators inside the room, the spawn jail effectively closes the server, meaning no one can enter when the room is not managed. This is an anti-griefing measure: each new arrival feels scrutinized, may be followed once allowed out, and knows that the room is policed, purportedly making them less likely to grief. The viewing window can yield whether or not the player is a premium owner of Minecraft–a demographic who are not expected to be griefers due to their monetary commitment to the game.