I chose those as examples of the norm.
You can look at a show like The Real World as a show that perpetuates racial angst and conflict. The directors plant certain individuals in a house and edit shows a way to provide racial elements.
The truth here is, is this really sports news? It shouldn't be, because it's just a dumb ass sign that has nothing to do with any game being played or any players performance. But because they can do a little spin on it, they use it.
The ends to the means is always ratings. Get used to it, is it a good thing? No, but it's not going anywhere.
Sports is already an area that is completely draped in racial tension, just look at this board.