The Exorcist is based on a fictional story. There's no evidence to suggest that the events in the story actually occurred in real life. It was designed to be a horror story, with elements of the supernatural that are not grounded in fact. It has been extremely successful in creating a sense of dread and horror among its audience, but it is not based on a true story.
Not necessarily. A fake profile is often created for various reasons that have nothing to do with a true story. It could be for entertainment, deception, or anonymity.
No. It's a fake story, which means it's not based on real - life happenings. It's often created for entertainment purposes, like in movies or TV shows.