You know, as a kid I grew up in a house where objects would fly off shelves, some nights when I was alone, I could feel a presence and see something pulling blankets off me. I could also hear the breathing of my dead dog, who’d make noise running up and down the stairs, and his nails would clack against the hard wood floors long after he had been put to sleep. I’d even hear the clanging of his collar as he’d roam around late at night. In one situation where something really nasty came to my house, I literally had a spirit strangle me. I also on several occasions believed I saw the previous occupant of the house whom had died there. He was also a ritual magician, who was quite professional and found himself in powerful company when alive.
I wouldn’t say that this was related to Feng Shui stuff.
I’d say there are dozens of reasons for this. I’ve seen spirits that naturally hang around certain areas. I’ve only noticed one type of a common denominator, that they tend to manifest in the activities of their nature, or in the presence of other beings of their nature. If you do tons of ghoulish and horrible things, expect ghoulish and horrible spirits to show up. Wherever the spirits have lease, it tells a lot about the so called “land lord” that attracted such a tenant, if not by directly calling them and those like them, than by their thoughts and actions themselves.
Seeing as how his entire family is understanding of the fact there is a spirit roaming this place, I’m going to say they know more about it’s presence than they let on, if they aren’t somewhat responsible for it being there, they seem quite at peace or at least used to it’s presence by now.
Just my two cents,