On the other hand, while Draco's ghost problem can be removed in a simple one-two move (one - order Draco's ghost to disappear, two, order every ghost to claim he's still around but is reclusive) (oh, and make sure to do it where there are only ghosts and Scarlet Seven as witnesses), his
awfully convenient one-time appearance will be raising eyebrows at least.
To summarize, it was done masterfully, Kieran. No matter what moves we can make, we're still only capable of at most keeping what we had, there are no true winning moves in this situation. Just like with Hermione's vampirism, now that we can see it this way. No convenient "no negative consequences" routes is exactly what Scarlet Seven ought to expect from the Halloween Curse.