Because I imagine that the Ghost Zone would hold all kinds of folklore and legends of their own.
Legend (At My Doors, 2)
July 9, 2013
You ask about the door no living soul has seen. The dead ones who pass by do not know its history, for it is no longer in their nature to be inquisitive. Yet even without knowing the door or its inhabitant, they know of it. The door is used as a landmark for spirits throughout the Ghost Zone.
For it is the only black door.
It is set in an empty expanse so long that you despair of finding anything of value beyond. Isolated; like it was meant to be.
It has only been opened once…
Many, many years ago.
(and now someone should adopt this so I can figure out what the story behind the door is! XP)