This is one of those things that, even as an atheist, can be open to speculation, unlike the fairy tale books written by desert people, things like hauntings happen across the world from america to china to japan, all over, so maybe their is something to it.
I say maybe, because I had this conversation with a friend once, the problem with things like hauntings is it is a lucrative market for people to make easy money off, so of course they will make up ghost stories, just buy a creaky old house and claim its haunted. You might even go as fr to make a tv series out from it. Ghost adventures is one of those shows that great to watch if your high and need something funny on.
But back to it, I think their just might be something, its just not as common as these made up shows and fake mediums claim it to be. I did stay in a house once on holiday with my family, very old house by the sea, and one night when going to the kitchen to get a drink of water, I looked down the long corridor across from where the kitchen joined it, and saw a figure stood at the other end, and it was by no means physical enough to be anyone else in the house. I dashed into the kitchen, came back, and it was gone. To this day I can't explain what I saw, but it did open me to the idea maybe their might be something out there... just not whatever ghost adventures claims it to be.
"IS THERE A SPOOKY GHOST HERE?"
of course people will bullshit about haunted houses, so its not surprising to have people call it for being bullshit, all cases. I would not mind looking around a haunted house though, like the winchester house, Lizzie Borden House or the Whaley House. The Amityville Horror House I'd probably not, because a lot has been said calling the story of what happened their bullshit, commercialized and made up to make money from it, considering people have lived in Amityville since the 'incidences' and have had no occurrences. The Lutzes and Ron DeFeo made up the whole thing to make money from it.