Hey Al
I'm a Christian and I do believe in the spiritual realm and I believe that spiritual things do happen that we cannot understand in the natural/physical realm. It is really crazy stuff that doesn't make any logical sense (I'm a logical thinker). I think if it ever happened to me I would claim the protection I have as a Christian through Jesus Christ. No doubt I would be scared though! I quite often pray for spiritual protection when I stay in motels when I travel with work around victoria. You never know who has stayed in the room/house before you and the lives that they lived and what religion/lifestyle they practiced.
My sister does house clearings for people that have houses with spirits that dwell in them. She can help clear out the spirits and understand why it is happening. She does do this with a Christian perspective however I don't know a lot about it (it freaks me out a bit). She is not a clairvoyant, however she has a sensitivity to the spiritual realm that I do not understand or experience.
She does this a lot as part of her job as a counselor/homeopath/reflexoligist/a lot of other things/ and does travel to the house affected. She has a lot of experience dealing with this and general house clearing when people move into new houses etc. I have heard many stories of similar things happening to other couples and families so this isn't isolated.
I'll PM you her details. Hope this helps.
Russell