It IS my subconscious, yes. It's given me warnings I've learned to heed. Once it gave me what felt like a kick in the gut, and once it felt like a kick on my rear end. Strangely, it doesn't fuss much about the habits I consider the "bad" ones. I've given myself a really bad time when my life has seemed stalled out and I believe I'm unproductive and incompetent, and it tells me, "relax, try to enjoy this time. Here's this other way you can look at things." And then even my runs of "bad luck" seem charmed and I learn something.
At the same time, I'm in doubt if that's really the cause of some of the particular nastiness that can come with the Ouija board. I'm also in doubt about it being "evil spirits" etc. as I see no good reason why these spirits would be more evil than average. There is something weirdly negative that comes out, though, IME.