For most, death is a gateway opening either towards the Heavens or the Inferno.  But for some accursed few, perhaps those who deeds can never be requited, death is neither gateway nor a destination. It is an eternal pause in which there is no rest.   Who cannot then believe that a ghost, so accursed, would harbor such grievance towards the living, it would hope to render them some measure of their own enduring torment?