Team up with a trusted friend over xbox live party, play the game together, and give him or her moderator status. After that tell your friend what she or he can do! Best way to find out the answer to this thread. The host should be able to demote whoever they selected to be moderator via the in game menu while playing. They can click in the menu on the player and untick moderator or untick or tick trust player, fire spreads, etc. It should be impossible for any moderator to run the hosts map when the host is offline, as much as it should be impossible for a moderator to kick out the host. Hosts have the ultimate control in the game.