The ability to "disappear" off the map for one other player/enemy by surrendering and never proposing a truce is a somewhat frustrating mechanic. It seems at times counter to the very idea of an augmented-reality-domination-war-strategy game. Domination and strategy mean nothing when an enemy can remain a threat to your allies by making himself invisible to you, at no cost, with no time limit.
As an alternative to this mechanic, I would like to propose a time-limited, resource-intensive, binary option for a player to be in-game (and able to attack or be attacked) or out-of-game. For simpl