>>Its the second time i hear from trusty people a demon-story about opened doors.
There are stories like that, tons of them. Like you, I find it hard to believe that these people are all lying, fooling themselves, or having pranks pulled on them.
I wonder though, why people are so quick to assume they know what it is? Why does "unexplained open door" mean "evil spirit", or a spirit at all? I know it doesn't help answer the question to ask MORE questions, but it seems curious to me that whenever someone sees a glowing thing that is human shaped, they call it a ghost. And whenever books fly off the wall, they assume it's an evil spirit.
Germs and viruses cause horrific effects, but they don't KNOW they do it. They aren't "evil" in any conscious sense. And until only recently in human existence, we lacked the technology to know they were there. Why doesn't anyone wonder if these effects are also non-intelligent effects of some low-level creature? Or perhaps not a creature at all?
I think I tend to give less credence to these types of stories exactly because the people telling them "have seen a ghost", when in fact they have no idea what they've seen. They don't know what it is, and they've labeled it "ghost".
Dave