As a white man, I applaud your decision not to allow the word to be used in this forum.
As has been pointed out, today the word has no redeeming social value: it is a pejorative used to consign an entire group of people to an inferior, "less than us" status, and is a prime hate word.
I am a middle class, educated person, as are most of my friends and acquaintances, and the word is never used amongst us. Nor has it ever been, in my circles.
In my opinion, and I may be wrong, the only thing keeping this word alive is it's use by the African American community (it's use by white trash aside) in their music and casual conversation.
Elimination of this word from the language (allowing it to die out from disuse) would remove one more bump on the road to a society where race would not be a determining factor in any meaningful endeavor.