As far as I'm concerned all you proven is that some people live in one city and give their address incorrectly as being in another city. It is no different than Cameramonkey's "BFE, IN 46241" hypothetical.That was not the topic. The discussion centered on physically living in one city and your address is another city. Metro is an appropriate descriptor in this case to describe the location that is not Indy but addressed Indy. I proved that beyond a doubt occurs. Not sure what relevance this has to that topic…
Although going all the way back to my original comment on the subject, that is still a much less common example than someone living in an unincorporated area outside of city limits while (properly) sharing the city name and zip code.
That said, this horse is beginning to smell so I'm going to stop beating it.