Angry souls and clairvoyant without ability

People without ability are calling themself clairvoyant. The technical skill to bring up questions are in seat of honour, when the clairvoyant pass on messages which they claim are from the death people. Many people and familys are misinformed when they get the answer to a asked question. They are mislead about their destiny. I wonder how can a clairvoyant sent á angry soul away, goodbye, I will not talk to you ? Why do you have to be quiet when the clairvoyant are telling about the died people and gets information which are not correct? Is it true that som people really are clairvoyant? Can you educate yourself to be á clairvoyant? Or is it á natural talent if anything?