Inspired by the 'paranormal experiences' thread.
I've never done a ouija board. But it's been mentioned several times on the 'paranormal' thread as dangerous, scary, and something you should never, ever do. But always in hushed tones, and without much detail of what actually happened to make people think they're so dodgy.
Can anyone who's used a ouija board and then vowed never to do it again please explain to me what's so creepy or dangerous about it, and what happened to make you think that?