I'm not sure. It could be that, or they could be more of a poltergeist than a proper ghost and enjoy the chaos of being unpredictable. It's possible the ghosts are the ones responsible for us being here, rather than the hotel itself. Or the reverse. So many theories. I don't think it'd hurt to try the Ouija board. At the very least, it can add to the body of knowledge on the hotel itself, even if it fails.