You can definitely unsend a message on Instagram. Pretty sure no one can see it if you do so. I think it has to be before the person sees it in the app. You still get the notification for it saying what it is, but the message itself should be gone on the app.I'm gonna have to give a big fat X to doubt on that screenshot. I don't use instagram, but does deleting your own message in a DM hide it from the other person? Also why would she wait to take a screenshot until after he deleted it? I know Greg is stupid but surely he can't be so stupid he'd send an unsolicited DM to a 16 year old while he's being so heavily watched.