The trouble is people WANT to believe in ghosts, I am regularly seen as a bit of an eccentric or even "strident" for telling people not to be ridiculous on issues like this, you can't prove there are no ghosts is the criticism, and then in that faux wise tone of voice, "the universe is far more complicated than you can understand with all your science",

aaaaarrrrggghhhh.

It's even worse when they say, "there are more things in heaven and earth than are dreamt of in your philosophy".

No, I'm sorry, but no. If you believe in ghosts and goblins, then you are not allowed to quote Shakespeare. When I become empress of earth (and trust me, the plans for that are already in place), the first law I will enact will be one which makes it legal to punch anybody who tries to invoke the Bard to bolster their feeble argument.

"Neither a borrower or a lender be. Shakespeare."

"No, not Shakespeare: Polonius. And Polonius was a boob, and Shakespeare knew it because he created him. Now give me the effing loan or I swear to God I'll torch this bank!"