Possibly they can hurt
somehow.. i heard alot of stories about ghost telling that someone heard a noise in the night when nobody was in that place etc.. and Have you heard about that thing of McDonalds?
(fake obviously) someone sit in a McDonalds (where the clown Ronald McDonald is) and said.. im really tired.. then the clown response im tired too.. and that man die in shock
reporters and police went to the scene of crime but then someone discover it was just a lie and a fake story