Seriously, I do think there are beings made of energy or whatever that keep a low profile for whatever reasons...and they vary in quality.
I'd stay clear of Ouija boards--I think somehow if you put a call out, or open up, anything can access you, and anything might be low class. I had bad experiences in my teen years after a Ouija board, which I threw away. The manifestations could have been take as evidence of psychosis, but I has no other symptoms and they went away--voices, seeing shadowy figures, touches, the sleep paralysis.
I have had none of those experiences since a couple years after the Ouija board--and they started when I started using the thing--and it's been decades. I was like--no and no, get away, I don't want to be bothered, leave me the frick alone...and after a while it all stopped.