See that's the way I've always interpreted the rules, I just wanted to make sure that's still the correct interpretation.Fellow tribe mates CAN eat up an inactives villages by conquering them just like anyone else -tribe mates or not. It is obviously in the best interest of the tribe to secure the villages for their own tribe - however, as Rev said, not by co-ops using the inactives troops to support their own villages, using their resources to supply the co-ops villages, using their nobles to secure other villages etc...
Running an inactive account as though it were your own is where it gets a bit sticky and can cause "opportunities".
Hope that helps.
DeChantal uses the word "opportunities" because she dislikes the word "problems".
That said, more than anything else regarding coplay, I wish they would go red regardless of a coplay logging in. I know of at least one case where a player didn't realize he was playing an inactive account as the co-op had told him he was barely logging on so he didn't notice the transition to total inactivity.