It's a good idea, and works under the assumption that an ID card would be something people wouldn't flash around (say, like a driver's license -- you can't scan into someone's wallet).
So Alex, IDs exist in RP, but the question is whether or not the person can see them. This clarifies that indeed, your scanners can see them.
And it goes without saying that the "Can trade, can hunt pirates" etc. stuff on IDs would remain on powercores.