All devils and demons are man made. Can a person become possessed? Yes and no? How come?

An individual can self induce himself/herself to be possessed. If you believe it you will make it happen. You are that powerful (or call it dangerous) depends on how you look at it.

Some in the old world of duality called this white and black magic. That is no longer doable though. The time for that has passed. Your waking consciouses might want to use it but your Christ consciousness is overruling it. Step out of the duality.

So no there are no demons in scary dark places or under your bed or hanging around old abandoned houses...you will not find any ghost or devils or whatever in any such places. They all reside in YOUR MIND and are as real as you make them. You should be scared of how much you can scare yourself.

You do it to yourself, yet it can be said that you are also being "helped" in this. By "help" we mean to say that you are being brought into a what most like to label as a "state of fear" and then "kept there". Once you are afraid "they" incept you with some idea (reptilians rule the planet Earth) and your mind does the rest. If enough people do it (contribute to it) it becomes a meme.