Riften is said to be run by the Thieves Guild. I know it's possible to join them. Now I wonder if I alternatively could bring them down as well. I do not mean killing all the NPCs, but I would rather bring them down in a quest-line of its own.
I want to know if it's possible to bring them down, because if it's not I would join them, even though I haven't stolen anything yet, as I want a rather complete play-through. And if it means selling this poor dark elf out ... well ... please tell me it's possible ;)