Board Thread:General Discussion/@comment-90.208.130.50-20130825223428/@comment-15888551-20130826010528

Most NPCs will not have a resoponse to it, or even know about it. Only the ones who you had to extort for that one quest, but it doesn't effect anything except for the line of dialogue that they use when you open a conversation, and the lines gaurds use. As for Mjoll, at some point she asks you about the Thieves guild, just tell her you don't like them and she's cool. All NPCs, quests, and shop keepers are not effected.