Do the "reputations" (something like that) you get have any effect in game or are they just achievement-like things? For instance I was supposed to run down a guy before he could deliver a weapon that had been found and when I caught up to him I pulled out my bow and shot him full of arrows before he could get back to me. For some reason this gave me the :murderer: reputation. I also picked up the :thug: one earlier apparently for friendly fire while in combat.