leaving aside all the demunz, bogey men and evil spirit rubbish....the real issue is filling childrens minds with the stuff--its just another form of child abuse.
i grew up with stories relayed by easily influenced dubs--including my own parents. it got to the point i was afraid of the dark--a pre-teen kid terrified of everything and anything.
fortunately--when i discarded jehovah and his watchtower gang,--- in my early 20's...the fear of demons went away too.
a few years later i overheard my bat-shit crazy born-in mother in law ( the sort that would have eaten a rutherford turd in a bread roll )---telling my kids about demons. i hit the roof. gave her a real evil spirit to be frightened of.