Confused why some people think it wouldn't be possible to do this. It's quite trivial setting up an impersonation profile in insta and making sure it is easily found with public settings and the right tags. A little photoshop manipulation from one or two publically found photos (school website maybe) and a whole host of images of a person in different situations can be created. No need to take photos in class. If the images created were obscene then you should expect the school to refer it to the police. At that time they may not have known how many people were sharing the account details to post. Not that should matter, especially if they were using school computers to create/upload images. Regarding suing for deformation, then unless it has caused substantial harm I can't see it worth pursuing. Its likely to take a long time and cost a fair big to get it through the civil courts and even then there's no guarantee you'll get a payment back.