OUija boards open doors. Sure, you may get Grandma, but everything thing else comes barging through the door with her. I started sleeping easier at my parent’s house back in the 1980’s. There was a stretch in the late 70’s where I could feel something wrong. My mother said, “we got rid of the Ouija board”.
The “true” story behind the Exorcist started with a ouija board. The possessed boy’s aunt was into the occult and played with ouija boards and included her nephew some of the time. She died and he tried contacting her through a ouija board. That is when the SHTF.
They originally thought the trouble was the ghost of the Aunt, but when the boy started speaking fluently in foreign languages and showing extaordinary strength, combined with objects flying around the room and bloody scratches appearing on his skin, that is when those observing decided....well maybe its not the aunt. After taking the boy for extensive psychiatric evaluation and therapy, to no avail, Exorcists were brought in. They finally succeeded in “curing” the boy and he did not remember any of it. He went on to live a happy life.
I agree, do not mess with ouija boards. Even if you believe that it only taps the subconcious and there is nothing supernatural about it, many people have been documented to have gone insane after using the board.
Stoker Hunt conducted an extensive study on the danger of ouija boards:
http://www.amazon.com/Ouija-The-Most-Dangerous-Game/dp/0060923504