Well i think quite a few peoples paper work is going to be a bit suspect then.
You would need the official sticker or written form for every MEP type in your log book. Which I have never recieved before. Also as well all those people who borrow friends aircraft and are checked out by the owner who isn't a FI (MEP) would be on sticky ground as well unless previously flown that type. FI(MEP) are not very common on the ground and very likely to become alot less as time goes on.