Yes, I know and congratulations! I'm not sure that quantity will have any bearing on the matter though.
References to "someone will lose an eye" etc. are a common rhetorical expression in English so take it in that light, but as I said, anything less than a very solid grip on the rifle the shooter will be in trouble.
There were references to the eye cup adhering to the shooter's face due to suction being created, but with the holes provided to prevent that it does seem a bit unlikely, unless it predated the addition of the holes(?) Might have been Brophy or one of the early writers who made mention of that.
Just to be clear the danger comes from the very short eye relief, not the eye-shade itself. There are references to this in Iriam or McBride IIRC.
What did you think of yours Jim?