Guys when determining whether such public performances are lame or cool and if they are disturbing the peace or not we must determine the nationality of said people. This is a very simple concept but is very very true. Let me reiterate whenever you want to judge such performances you cannot look at the performance itself but at the ppl doing that performance. Don't believe me, watch this.
The people doing that haka come from new zealand, which is a white country. White ppl from western nations as you know are cool and friendly and outgoing and spontaneous. Therefore when they did that it's perfectly cool. Now suppose say a bunch of sinkies did that or maybe tribes men from some 3rd world country did it or some china men did it. Now that would be terrible and utterly disgraceful. Search your own heart and tell me if that's true and that would be how you yourself would judge them. Even the forummers saying this performance is good would change 180 degrees if such attention seeking antics was done by another nationality.