Is it ethically permissible for his enemies to use Mordekai's list of
nobles and structures to hunt his faction, or would that fall under
Atnerk's canon 'gainst cheating?
If he had posted it in a BANNER or CONTACT in the game, I'd say yes. In
this case, I think it's not okay.
But for my part I've deleted it quickly before I fall to temptation.
-rcb