Just so you're aware KC, it's known amongst the Order as well as Neville, Luna, and Ginny, that Draco is a Death Eater (seeing as Harry would have at least told Ginny, if not the other two as well). As far as whether the other DA members know, I'm making an executive decision that they didn't share this, most likely because it didn't come up during the occupation of Hogwarts so Draco can keep his Dark Secret bit. The reason it hasn't come up in the fight will be because even if it was mentioned, there has never been real evidence that he's actually an initiated Death Eater, just something that Harry had been saying for the past two years or so.<br/><br/>Also, KC if Draco were to decide to leave, Tonks would stop him.