Agree with Buffy, it's a tired chant and should be retired. Personally, I feel there's no reason to sing it unless we're playing against an Auckland team or playing in Auckland, in which case it's fair game. Other than that I don't feel it adds too much these days. We've proved that we're not Auckland any more through our achievements, both on and off the field, so let's focus on our successes rather than their failures.
Unless we're playing against them, in which case yeah, rub it in

Hamilton was a bit of an exception because a large amount of the Zone were from Auckland, but I personally don't feel that chant adds too much at the Ring of Fire.