There was a guy on Radio5 Live this morning (a caller in to prog) who summed it up (imho) rather well.... he said summat along the lines of 'I'm of a similar age to Jeremy Clarkson, and yes, when I was a kid I used that rhyme without knowing what the n-word really meant, or being in any way aware of any consequences of using it. However, the world has moved on, things have changed, and anyone with an inkling of awareness of the world knows that it is at the very least contentious, and very likely to offend. So I simply wouldn't use it'.
Sums up my view too.