Yeah, I've heard the little boy/girl story many years ago, they died from head trauma on the ride (BTTF) or something like that and would many times be heard/seen in the omnimax domes at night and weird things would happen. Hey, you never know, maybe it's true! I know in it's early days BTTF had many complaints and accidents. Didn't someone get their hand cut off or severely damaged from the closing gullwing door?
On a note about Disney, my friend is a medium, and believe it or not, he says there's an unbelievable amount of ghosts in and all around Disneyland, but most are just happy haunts that felt a connection with the park. None in DCA of course