My previous comment was based on personal experience.
I did use an Ouija Board with a couple of friends, back in my HS days, just for shits and giggles.
I thought it was just horseshit, until I happen to find out that two of my closest friends in HS who also used said Ouija Board died from strange circumstances.
One starved himself to death, the other hanged himself on the balcony of his home..
The family of the guy who hanged himself said he suffered from depression and schizophrenia.. to the point he would even hurt some of his family members.