Oso Blanco wrote:
And it works the same way in the US and countless other countries ... so why would the UFP or the United Earth work any differently? Countries and regions and districts and whatever will not be abolished just because they have united in order to form a common government.
In the 4 TV series, hundreds of hours of television - the multiple times characters have visited earth and in all the previous films and TV episodes when they visited earth - not once did we see any flag except the UFP.
So, it's simply adding new material to the Trek canon that former nation states keep their old vestiges.