The problem here seems to be that they didn't ask the people who lived in the town what they thought about it.
I think Martin Luther King Jr was a wonderful man and did great things, but changing a street sign on the basis of one request, without at least getting the general consensus of what the rest of the population thought was a mistake.
I have always thought that Martin Luther King day should be in April, when he died, not his birthday. To me that brings him more honor, because it would be when he became a martyr for civil rights. That's just me...it just seems to make more sense. Just a petty thing the date.
I think one of the greatest ways he was honored was by U2 with their song In the Name of Love...makes you wonder how many white teenagers in the 80s start actually thinking about the man in a new light.