why are people scared of ghosts? except in fictional movies they never seem to harm anyone?

Many may want to orient and/or be oriented into the appearance of such directions because it would seem more simplified and exciting than boring that way where most would perhaps want to feel significant enough for the attention and presumed desires(like how they are supposed to be out to get them)of other entertaining forms of existence that(or many of the images of which)could be humanly illustrated as lower and unsightly(thus more evil to man:for a kind of logic),for the relative pride in dust.Other factors that i guess would be basically fueled by egoistical desires to be,to survive and to last(in spite of the apparent physical death and the essential worldly void of ignorance and uncertainty)could further contribute to the relative most likely attaching,overstating and overrating emotions…

Movies and TV shows are usually the only place people ever see ghosts. And on the screen, ghosts are almost always portrayed as bad and scary things. Besides, ghosts are the unknown and the unknown is scary.

Keep in mind that nobody can prove they even exist. I believe in them, mostly because I've seen a few with my own eyes, and I can't prove a blasted thing about their existence.

In reality ghosts are just people without bodies. And you're right, nobody has ever been harmed by a ghost in all of recorded history. But that doesn't make for a very good story at all, so the filmmakers do what they're good at: Make it a good story! And if you don't have a good story, there's always good special effects.

it's the idea of the unkown and the idea that someone may be watching you and you not know it or the idea of the afterlife--they're all common features that tend to scare people because most people don't want to think of it or dont like not having answers and if you think they dont harm people in fiction movies then i recomend the Exorcist:)