France was hit with the most idiotic fine in rugby history: for having crossed the halfway line while confronting the haka.
So it is OK for New Zealand (and Fiji, and Samoa, and Tonga) to threaten the opposition - because that is what a haka means - but it is not allowed to step past the halfway line.
Everyone (including the New Zealand union and Eliota Fuimaono-Sapolu on Twitter) is calling this fine "retarded", or more or less polite sinonyms.