Edit: I wrote this post about 7 years ago. Recently I've learned that seeing the n-word typed out in full is triggering for many people, regardless of the context in which it appears. For that reason this edit redacts the word.
I guess it's no surprise that we no longer call these black sweets N****r Balls.
As a kid I was oblivious to the fact that the name given to these could be derogatory - I'd never linked the name to the obvious connotation, and I suspect that the same was true for most people (or kids at least) back then. Today they're simply called Black Balls, which I guess is a less objectionable name.
The word "n****r" has never been a commonly-used term in South Africa. We have our own set of offensive terms that have for many years now been considered unacceptable.