Share this on your Instagram, Twitter, Snapchat or Facebook to make everyone aware that this is a hoax that has happened in the past (July 2016).
The posts that are now being shared around by celebrities read:
So, do you think this is real?
Obviously, just from the wording alone, we know this is fake and a hoax. While there are some celebrities sharing it, Instagram is not going to recognize this as a legal document if they use your pictures. Note that years ago users agreed to let Instagram use their pictures if they were on a public account. If you have a private account, you do not have to worry about your pictures, private DMs or messages being used.