I just figure it is like all the ghost rules that modern day ghost hunters think they know. For instance, why would ghosts hide in basements and attics? If I am a ghost, I am choosing my favorite room in the house and claiming it as my own. And who decided that ghosts have to stay where they died, anyway? Or, my favorite ...how do ghost hunters always seem to identify the spirit they are talking to? Like "in the attic lives the ghost of Martha, who died of dysentery and stays to look after the house she loved.". How does anyone know who it is, or if it is even the same ghost each time? It could be the ghost of Clyde, a perpetual liar and jokester, pretending yo he Martha. Or a demon. Why does it even have to be someone who died in the house? Who writes all the ghost rules and then teaches them to others?

I just hope....and writers, pay attention please...that at the end of the show's life Samantha doesn't wake up at the bottom of the stairs and realize she just dreamed the whole thing. That would be so lame and would disappoint me badly.