User blog comment:IamJakuhoRaikoben/Chapter 263: Crime Sorcière, Review./@comment-2106167-20111209222654/@comment-2106167-20111209223848

Well, maybe they gained a "legal status" during the timeskip... Possibly due to Makarov not talking against them due to his son's notoriously evil personality... Who knows... Actually, I don't remember Raven Tail having been mentioned as a Dark Guild from the very start...