I'm not religious but I believe ghosts exist. I don't know if they are the actual dead or memories of people or things. It's a confusing subject. I lived in a house that was haunted by a man who looked like he was in his 20s, and a cat. Everybody in that house saw them. I'd see him through the corner of my eye and turn around and no one would be there. This happened regularly. They both lived in my friends' room, and both of those friends said that they would see him step over beer bottles at night. And no I don't think it was cause we were stoned 24/7. I think my cat also saw them. Cats are pretty in-tune with their surroundings. He'd do odd random things, like hiss at nothing.
There's a town my friend and his mum lived in a few years ago, it's an old mining town and it's literally a ghost town. Everybody in that town has stories of ghosts. There's a graveyard there that has a tombstone that is cursed. If you stand over it or on it, you will be cursed. Well, there was one smart ass who didn't believe it and had photos taken of him lying down on the grave. The next day, he died of a heart attack and when the photos were developed he was missing from the pictures. TRUE STORY.
My friend went to an old abandoned psychiactric hospital once to explore at night and he swore the place was haunted.
My mum used to work as a nurse in a hospital. One night she heard the sound of the typewriter in the office, even though the light was off. She went into the office and turned on the light and no one was there. Then when she turned off the light and left the room she heard the typewriter again.
A couple of friends of mine lived in a house that everything always went wrong. One of them saw a man who looked burned and bloody and he was NOT a nice guy. On her 18th party (I was there) a friend came in and said, "There's a guy here who was burned to death. He's not happy." Things always went wrong in that house. Arguments, fights, there was a lot of tension.
Then there's the haunted house near the docks in a suburb called Williamstown that's quite famous. Story has it that in WWII, a man went off to war and his wife longed for his return but he never came home. This house is abandoned, but at night you can see a light in there (There's no power to the place) and a woman. A couple of friends were thinking of squatting there but when they saw her, they were like, "smurf this" and turned tail. A couple of people have told me they've seen this and they don't know each other at all, (one told me on Friday and the other told me 7 or 8 years ago). They have no connection to each other. Like I said it's quite a famous place.
On my parents' honeymoon, my dad woke up and said to my mum, "Robert (her brother who was dying of AIDS) was here. He told me to look after you, Annie." The next day, they get a call from the hospital saying that Robert passed away that night at roughly the same time that Dad woke up.
And those are just a few ghost stories. I've heard others but I can't be bothered typing them. Anyway, to provoke ghosts, I think you should try the ouigi board thing. I don't know if it works or anything but it's worth a try if you REALLY want to provoke ghosts.