New Zealand's infrastructure is significant to 4GW in that is is extremely fragile; systempunkts are everywhere.
Along with food, water and electricity, telecommunications one of the cornerstones of Western society, and information warfare is a key tactic in 4GW. The majority of all wired telecommunications in New Zealand is controlled by a single company (Telecom NZ) and a single failure can have far-reaching consequences.
Early this morning a power failure at a single datacentre in Auckland caused a telecommunications outage (including internet access - most of New Zealand relies on ADSL) for up to 700,000 people and stopped mobile point-of-sale terminals, and even some emergency services communications.
The outage was resolved within 2 hours, and occurred during non-peak time (early Sunday morning), but how long will it take before these single points of failure are exploited by 4GW combatants?
In asymmetric warfare, the smaller force seeks targets that maximise return on investment (cheap explosives used against telephone exchanges, for example, causing massive economic damage for very little expense). A disabled generator and cut power lines won't be fixed in 2 hours.