I watched a particularly intriguing episode of Ghost Hunters last night. I must admit, I do prefer this group to the international group. One aspect of last night's episode that I could not shake from my mind has to do with electromagnetic frequency. One of the methods the teams use to debunk hauntings is the presence of man-made electromagnetic frequencies, such as that coming from wiring or other electric media. When such things are not present, electromagnetic frequencies (or EMF, as I am loath to call it), typically signify that a ghost is there.
My question about this hypothesis is: why does man-made electromagnetic frequency rule out the presence of ghosts? I should think that ghost hunters look in places where electromagnetic frequencies occur -- man-made or not. I imagine such places are swimming with spirits. Ghost hunters should then put away their electromagnetic frequency detectors and use other methods to ferret out ghosts.