I believe that dealing with refugees should be done "naturally". Unless there is a clear and obvious OOC-link that smells fishy, there should be no reason to frown upon refugees OOCly. Yes, they might threaten the vested authority in your realm. That's a side effect of refugees. If you don't want to take the risk, you can kick them out... fabricate some reason to kick them out or just make it clear you're the boss. But there are many ways to deal with them. If you can successfully assimilate such a group, it is a great addition to your realm.
