I'm a lurker and totally late to this party, but wanted to reply. I believe with no uncertainty at all whatsoever that Ouija boards are bad news. I'm not sure they're direct links to evil, but I do think that you open yourself up to evil when you use it. I have personal experience. It was awful.
Like many, I was in college. Some chick on another floor had a board, she and it were on our floor in another girl's room, there was a hoard of us in there using it. Four or six with their hands actually on the pointer, others of us, like myself, just observing. There was, supposedly, an evil entity that called itself "Z" coming thru, utilizing the pointer. I said, ok, guy's, g'night, and went to
. Later that morning, I was asked if I could keep it in my room until the owner came back for it. Sure, I said.
Number one rule that I did remember was never ever use the Ouija board alone. Ever. I'm watching TV, it's mid-day. I'm alone. I said, eh, what the hey. I put the board on my lap, I put my hands on the pointer. I said, "Is anybody there?" And that pointer moved forcefully and all by itself right down to the letter Z like it was the most important thing on Earth.
To say I freaked would be putting it mildly.
I ran like my ass was on fire out of my room more scared than I've ever been in my life before or, frankly, since. I told the girl to come get her stupid board, which she did. I then proceeded to be terrified every minute of every day for a week. I don't want to go into detail, but the end result was someone I looked up to in my convincing me I'd be protected. Once I believed a benevolent entity out there was counteracting Z, then I slowly got better. I was a Freshman -- a young Freshman -- and it was a terrifying time.
I absolutely believe that evil is out there to leverage users of these things via the Ouija board. They're not evil incarnate, no. But they offer a tool for evil to manifest.