I don't believe in ghosts. The Bible states:"The living know that they will die but, the dead know not anything..." "their love, and their hatred, and their envy, is now perished; neither have they any more a portion for ever in any thing that is done under the sun. "
I believe that these "ghosts" are actually demons. Satan makes things look good to people. Some want to see their dead loved ones or enjoy supernatural stuff. That's Satan's way of keeping people away from God.