Fake Casting is where fake casting accounts hold auditions for a specific show and people audition for that show. When they have enough auditions or the due date has passed, the account creates a cast list with the people that auditioned. This is a lot like a doing a show except that you don't actually perform or rehearse. If you would want more information on this subject, please view the site https://www.buzzfeednews.com/article/juliareinstein/musical-theater-teens-instagram-fake-broadway-casting