Beer,
I hope I'm not posting too soon after my intro or saying this wrong, but you pose a very good question. When my X "heard visitors" he used to grab the Bible, open it in the middle like Jerry Swaggart (pages flipping back and forth in the breeze), hold it up while walking from room to room turning on all of the lights in the house, and call out in a commanding voice, "By the name of JEHOVAH, I command you to GET OUT!!" I was aware of no "visitors." Now-a-days, I really don't believe in the demons but do hope there are a God and angels. That would be very nice. It seems like such a silly thing to me to call out anything at all. Schizophrenics "hear" voices, too. I really am confused on this point. Does it matter what a person yells out?
Chenoa