I get the idea of using something after an incident to let other people know you're not the bad guy, so you don't get shot. But will cops arriving even see this badge thing you're holding up? I think the only thing they will see is a gun. If they show up you better put it down quick, that is, if you haven't already holstered it.
That shoots down the only possible advantage I can see to one of those.
So, I think the ccw badge is a dumb idea. Screams wannabe cop, and I'm sure it would look that way to a jury. It would probably look that way to a cop, too.
my $.02 worth.