do you believe in ghosts?

Assalamualaikum, readers.
this entry is rather controversial., but i just have got to write it down...for no reason.
i've watched a lot of horror/thriller movies, be it Hollywood, Bollywood and even local movies and they all come down to one same element...faith in God. 
i bet you guys have watched The Conjuring before. i simply choose this movie, coz it's easier to discuss here.
basically, there was a witch who died in the house the family just moved in. the family does not believe in God, their kids have never been baptised before. i bet they don;t go to church either.
in Islam, the first thing a person does once they move into a new house, it is recommended to perform a ceremony where everyone recites the Holy Quran and read some prayers to 'clean' the house from evil spirits. we believe that these creatures exists, but we can't see them. and they live with us in our everyday life, they won't bother us if we leave them alone.  
same goes to other culture, you can read more here. 
So, in the movie, they have not much faith in God, and therefore, they are more prone to being bothered by these spirits. 

are they friendly like Casper?

Let's see how 'bothered' were the ghostbusters, the husband and wife. They chase away unwanted spirits from others, but how come the ghosts don't disturb them?
please don;t tell me the ghosts are afraid of the couple. that's not true.
the trick is, the couple are very faithful to God. the evidence is shown when the husband explained that they'd perform some ritual ceremony in the room where he keeps all the dolls. plus, he's always holding a Bible.
so, my theory is, ghosts, demons and evil-spirits love people who are not faithful to God. when you are close to God, your faith is strong. people who have no faith are weak, and it becomes easier for them to take charge of your life.
in the case of Malay movies, the people who are 'disturbed' are those who doesn't pray and recites the Quran. and the house are full of funny furnitures that the creatures love. at least, that's what we believe in.
i need to also tell you something. this may sound superstitious, but it's what the old people used to say. don't go out at night, especially after sundown. it's the time where the creatures love to roam around...their time to wake up. also, if you see or smell something funny, don;t mention it...don;t say it out loud, because they believe that the creatures would hear you and they'd know you're afraid...and weak.

i don;t remember all of them, but i usually don;t question much and just follow what's been told to me.
conclusion is, you need to have strong faith in God...and believe that these creatures exists. because it also happens that if you challenge them, they'd appear more powerful, because they'd like to give you a piece if them. so, please don;t do anything stupid by playing an Ouija board, calling some spirits to talk to you.