Back when children did things other than stare at computer screens all day and wonder why they have no actual friends, this game was standard. I do not know anyone who didn't play it, as silly as it is (my question back then is why do it with eyes open? Why does the planchette have to have fingers on it at all for that matter? Shouldn't the 'spirits' be able to move it themselves if they can move living fingers?).
Thing is, not a single one of us went Linda Blair. No one contacted anyone either.
Sounds like false advertisement to me.