According to Tehol Beddict: "After all, you do much more than, uh, harvest rats, don’t you? In fact, your primary function is as the unofficial assassins’ guild -unofficial because, of course, it’s an outlawed activity and unpleasant besides. You’re also something of a thieves’ guild, too, although you’ve yet to achieve full compliance among the more independent-minded thieves. You also provide an unusually noble function in your unofficial underground escape route for impoverished refugees from assimilated border tribes. And then there’s the—" ―Tehol Beddict to the Rat Catchers' Guild