A subject that comes up frequently when I'm reading is the idea that at a certain point "magic" and technology are indistinguishable. (Googled
this idea real quick and it is credited to Arthur C. Clarke) This is a sound theory, to me. While I'm not 100% convinced on a lot of the ideas that
wind up on History Channel's Ancient Aliens, I wouldn't say it's a wild theory to believe ET's played a part in our early development in the form
of "gods", using their advanced technology to teach/guide/manipulate/fool the primitive humans, whatever your point of view is.
I think the spirits that are here, whether they are what remains of certain humans, or perhaps they have even been here since the beginning, are
probably "advanced" in so far as they don't have the same needs we do, and they have abilities beyond our means. However, they are stuck in a
world in which it probably takes a great deal of energy to interact with. We are physical, they are not. And because of that, I imagine they run the
range from benign, to bored, to mischievous, to borderline insane because they are in a realm that isn't really made for them. Perhaps individuals
who have some sort of supernatural ability are able to use the human body as a conduit of whatever energy our spirit is made up of. I don't know
enough about the topic to hold a solid opinion though.
To touch on your main point though, yes, I believe this sort of thing is a kind of advanced technology. ET's or those in high places probably have
an understanding of, if not access to, the technology. And the rest of us really just get glimpses here and there, "glitches" that let us see
spirits or experience weird things of our own. Mind boggling topic