Some wraiths see messing with the living as a hobby, others see it as a crime. Then there are the Haunters, to whom it's a calling. They're the ones who make the stories you read in the tabloid rags, the ones who make the walls bleed and the sky rain vermin. They're the ones who like to terrorize the innocent, to hound the wicked, and generally to make life hell for anyone they can find.
Used availability for Lucien Soulban's Guildbook: Haunters