Yeah, the 'idea' has me scared...
Going with the 'idea of ghosts' bit, I voted yes. If, as is often claimed, ghosts are human beings who have somehow been condemned to perform some Sisyphean task for eternity, then I find that possibility scary in a similar fashion to my dread of living through Nietzche's theory of eternal return.
Edit: if ghosts aren't 'stuck' with their fate (they could be psychic traces or subconscious projections of the viewer etc.), then i'm not scared in principle, just very, very interested.