This will ignore the game checking for game state before a player joins the server, for example, if enabled game will not check if game is running or starting.
This option was added to work around some specific problems in some very specific scenarios.
DO NOT set this to true unless you really need this, you will need to set a whitelist system using the new command system:
Added a system to execute commands when:
Game ends
Options.Game.End-Commands
You can use %player% placeholder to get all players
Game starts
Options.Game.Start-Commands
You can use %player% placeholder to get all players