I did say can be clever and affective. That example is completely unacceptable and should have resulted in ban. In my opinion.
But the point is, why does it matter who says it?
A better example would be McGrath/Brandes and Brandes quick riposte to a McGrath sledge. Brandes is not good enough a cricketer to give it to McGrath, yet he does and it is clever,so it is right.
If it is clever enough, no matter how good you are, sledging is fine.
If it is blantantly disrespectful,doesn't matter if you are the best player in the World, shouldn't be allowed.
(apologies, just realised, possibly not the most thoughtful of choices being the Sydney "pink" test. Sorry for any upset).