I used to be a ghost hunter. Mostly staying in hotel rooms that were said to be haunted. Most of the time nothing happened, but I have had some experiences I couldn't explain. I'm a debunker. I wanted to know if it was a real experience or if it could be explained.
It didn't scare me because I didn't think that it was the spirits of the dead. I thought it had more to do with string theory and parallel universes.
Take what the call residual hauntings. The "Ghost" would say go to a bookshelf, get a book and sit down with it. No interaction with the living. That's not a spirit. That's a breach in time and space. These hauntings usually happened in places where limestone was abundant. The ones that interacted, I didn't know what they were, but I figured they were still not spirits of the dead.
I stopped when I found out the bible said not to communicate with the dead because it opens you up to demons. Nobody's got time for that.
I went to look at Hailey's comet when it passed by. You couldn't look directly at it. The light was too dim. You had to look to the side of it so the light would hit the more sensitive part of your eye.
Scientist think parallel universes are on top of us. Not above us, but like in the same space we are in. Have you ever seen something out of the corner of your eye and when you looked at it, nothing was there? Try looking away again and see if it reappears. You may just find your seeing something from a parallel universe.