Before I met my wife at School, she and her friend one day dabbled in the latter of what you cover here.
As soon as she walked through the door when she come home, some how her mother knew something was up and just came straight out asked her, have you been doing the likes of what you mention.
Her mother being a very devout Christian.
Coincidence that the mother just knew???
Another incidence, many years ago my mother and some sisters went to one of these things.
At the time my Father was in hospital, they asked how he was doing on one of these boards, well,....it spelled out Dead.
So all panicked and stormed out of the house in a flash and down to the phone box to ring the Hospital.
They asked how was he and the nurse said he was OK.
Well then,...as It turned out, the nurse when they called was only going by an earlier check that she had done.
The Fathers lungs had actually collapsed either during this call or soon after.
Not sure if an alarm went off or the nurse checked because of this call?
Anyway, Doctors manage to retrieve the situation.
I remember years ago as a kid, there used to be an old lady, distant relie via a marriage who used to read tea cups.
It would seem, she was often on the money.
One time she picked up my Fathers cup and instantly with a bit if a look on her face put it down and come up with some reason as to why she couldn't read it.
5 or so years later my Father was dead, he was off the side of the road doing a pee and a drunk in a cattle truck, cleaned him up.
So is this what the tea cup reader saw? (death).
