There are too many things we can't explain in this world to discount supernatural causes, IMO. Yes, we should maintain healthy skepticism (ie: Is the door banging open and closed on a windy day REALLY because of a ghost? Or is it the wind?), but members of my family whom I respect and know are not insane have had contact with......things that defy explanation. See my previous posts about my father's upbringing. I also know someone personally (not in my fam) who is experiencing disturbances now. They're frightening to say the least. Cupboards opening and closing on their own, footsteps in the night, their kids being taunted by a mysterious "child" who yells at them and stands next to them looking angry. Very, very curious.

As for YIYF's post(s), nothing would surprise me.