I'm very disappointed in this law, and ashamed to be kiwi.
The three main things I'm against is:
a) The law goes against a basic principle of our justice system which is "innocent until proven guilty"
b) It was pushed through parliament by a process which circumvents most of our democratic protections
c) It still doesn't deal with the fact that account holder != computer != person
I was involved in the consultation for the first version of this law, and the process for the notices is a horrible convoluted pass-the-buck around ISPs due to the issues surrounding IP ownership vs the end relationship with the customer, which is further complicated due to our privacy laws.
I've always said that the law was akin to charging the owner of a car with a hit-and-run when they weren't the driver.
Shame on you NZ Parliament!