It's interesting how people perceive things differently. To me it looks like it's close to the grill on the other end of the room. I was also surprised to see that it doesn't provide EXIF data.
Wes, I like your "rule of thumb" for this. That being said, I'm not trying to capture anything paranormal, I simply became very intrigued when I started seeing these shots. On one hand, it would be very cool to actually capture something like that, on the other hand, I'm not sure how excited I would be at the thoughts of it being in my home.
Isn't there some way to be able to tell or at least create more of a controlled environment, so that you would have a way of knowing what the more likely scenario is?