I saw a CCW badge in a gun store a while back, and it made me chuckle.
I suppose some could try to justify such a purchase or use of a badge in case someone else were to see your CC rig, and see the nice, official looking badge next to the rig, that person may not get as weirded out thinking you're an off-duty/undercover LEO. But I am just guessing.
My hunch would be that such an unnecessary item would more likely appeal to the permit holder who more or less fancies himself the "next best thing" to LEO... and then have the "badge" to prove it. But that also IMHO.
I see it not only as unnecessary, but more to conceal. :fie: