Would actually promote Tribs to get outside the city and track down criminals a bit more. I think it would be neat if Arkham asked for help protecting its city. Not make it a full protected city, perhaps have it the location young Tribs start out. They only have limited powers. If they hold the fetish, they can place warrants there and call guards. If they do not have the scales, the city wants nothing to do with them and they have no power at all. Maybe merchants there charge them more because of it.