I'm considering creating an MMO RTS, where battles could last days or even months. to explain things quickly, imagine star craft, where 70 players join one map, who don't know each other. about half are set to one team, and the rest on a second.
Each player has free reign of a particular region of the map, where they do their city building, prepare troops and defend. But with a battle that could last several days, players will be leaving and coming back later. It makes no sense for the whole game to pause for this, or for their buildings/troops to disappear. But that leaves their base unmonitored. I.e. if they are attacked, they can't choose to boost spending on more training, repairing buildings, or start building more turrets, etc...
My plan, is to allow other members on the same side to manage their resources (not take them) if a player is off line, and their base is under attack. possibly even if they are not under attack.
How do you think that should be handled. What concerns do you have, what risks, or ideas to improve? Any opinions at all.