They REALLY need to put a limit on how long a co-play remains active. There are situations where the owner of the account is known to have quit and now the co-play is just using those troops and villages as a slush fund for his own personal campaigns. In essence, he doubled the size of his forces over night. If the account owner has not signed on for say 30 days, the coplayers should be given a warning that their access will be rejected after a certain period and then all those villages come under the normal "inactive" rules and go gray when their time comes. This issue is very widespread.