Well it is easy to say something can not happen when you are closed minded.. But if you have an open mind anything is possible. I am not saying I believe in aliens or UFO's. But I do believe that there are people that either are too afraid to go into that light, or just don't want to do it alone, have unfinished business or something. They aren't circus animals, and so why would they want to just come around at a certain time to entertain paying individuals? I think if you go searching for it with the attitude of "There is no such thing as ghosts" you won't see anything. But I know too many people, who have seen something or someone, whether they have personally known them or not and can relay that image or situation with accuracy.
Believe or not, it is your loss. But just remember you can't see air, but everyone knows it is there. You can't see protons and neutrons but they are all around us. So are germs, germs can even hurt us, but we can't see them. My point is, just because you can't see something, doesn't mean that it doesn't exsist.
So doubt what you want. But there are people in here who have viable experiences, and publicly doubting them is unfair.
My husband when he was 3 years old had to have emergency surgery on his appendix, he dang near died. But when he was lying in that hospital room alone while his parents were talking to the doctors. There was someone, who looked familiar that walked into the room and played with him, kept him company. When his parents came into the room, this person vanished. Before my husband was born, he had a brother that had died 11 years before my husband was born due to an defect at birth. My husband described this person to his parents, the best a 3 year old could, and he described what his brother possibly looked like, if he were alive then. He can still tell you with accuracy what that person looked like, what he was wearing, and could probably even draw him. You can not tell me that a 3 year old boy who had never seen his older brother would be able to describe someone that accurately, without seeing something. Especially if it stays with you.
A ton of people don't have to see a sighting to say it is true.. I will give it to you that Paranormal State is just an entertaining show. But what actually happens in peoples lives, is real. No strings attached.