I wouldn't go near ouija or anything of that kind. I'm not even sure I believe in spirits and the like, but the scariest things you can see are inside your own head and if you convince yourself you are being haunted or cursed, you'll start looking for the evidence and finding it. Those noises in the night that your house has always made, that cool draught that has always been there but you never noticed before, that feeling of dread that you're actually bringing on yourself.
I wonder if there is a possibility you could actually drive yourself mad by doing this. Especially if you had undiagnosed mental illness or a family history of it. It just isn't a game I'd want to play.