I used to really admire the Haka when I first saw it, that ancient cultural heritage argument meant I was in favour of respect for an opponent's traditions. Then NZ started changing it, suddenly there were different versions of the Haka, now we seem to have a war spear involved. Then you get the huddle and collective prayer before the challenge. It all starts to smack less of culture and heritage and more of brand.
Why are the opposition required to face it? Can the players not be engaged in warm up drills while you do your thing in your half? And if you are required to face it why can you not issue a challenge of your own, the advancing forward or standing close enough to hear it etc etc.
I assume OP was trying to be funny. Do they really think 30k+ opposition fans are meant to stand in silence while 1 team gets to do what it likes to a global audience??? Singing your team's song isn't booing, jeering or showing disrespect. It's meeting a vocal challenge vocally isn't it? Or should England fans wait their turn and delay kick off further?