So is a Ouija board a shareable or a gate keeper interface ?

I was reading about shareable interfaces and noticed an interesting part about "Manipulative access" talking about systems which either have a) one person (gate keeper) doing the manipulation or b) sharable (many people get access eg multi-touch tables) and I thought about this interface the  Ouija Board.

So is a Ouija board a shareable or a gate keeper interface ?

picture by dragonoak.