I think science is explaining it. Ghosts are no more spooky than quantum erasure, quantum tunneling, or quantum entanglement.
When taken into the context of a data stream of information, it's all very "Natural." The larger consciousness system still has your dead uncle Joe on it's hard drive.
If it will wake a person up to a larger reality, perhaps by having uncle Joe tell you that he hid gold coins in the back yard, and you go to the place he specified and find gold coins, well you have some questions that need answers now.
They are only spooky because we do not understand them (assuming they are real). As I said, we fear what we do not understand.