We knew that Mavis Beacon was bound to attack Ariana sooner or later, especially as Ariana Grande refused to acknowledge any possibility of Mavis taking over Miley Cyrus' body, and thus saw fit to ignore any necessary precautions against a future attack of Mavis Beacon. For one thing, Ariana should have disconnected herself from her twitter, Facebook, and the internet in general if she did take the threat of Mavis Beacon seriously.