interestingly brooker wrote about this on the weekend.
http://www.guardian.co.uk/tv-and-rad...er-screen-burn
I hate to break this to you like this, bluntly, in the middle of a TV review column – ghosts don't exist. Nonetheless, many people insist on believing in them anyway. These citizens are beyond help. Ask if they believe in Scooby-Doo too, and they'll accuse you of sarcasm, even though he was at least based on something with some grounding in honest reality – ie the animal known as a "dog" – unlike the spooks and ghoulies that chased him and Shaggy around, which inevitably turned out to be local gas station attendants wearing costumes to scare people away from the gold they'd discovered.Anyhow. Since ghosts don't exist, you're guaranteed to never see a ghost in an episode of Ghosthunting, no matter how hard they hunt for one. They might as well film themselves searching for Smurf eggs or trying to jump over the moon. But they don't. They just stand around breathing. For two hours.