This absolutely needs to be corrected. Any other game where a team sits inactive for a period of time would be disqualified.
I believe by implementing a auto repair system where if a city has been attacked and goes without a repair for an hour a building will auto repair, continuing to repair a building after each hour has past with no repair and provide the city mayor no reward for the auto repair. After a period of 12 hours a city would repair itself out of the shield. This would prevent teams from getting a lead and then not playing anymore, just to achieve a win.
Please fix this terrible cheat.
War Whisperers Mayor
Midian
[Do not accuse others of cheating - CM]