Thankfully, common sense has prevailed here - trying to say that an ISP (Internet SERVICE PROVIDER) is responsible for what it's customers do with the service is like saying that phone companies should be responsible for whatever people say to each other on the telephone. If 2 people plan a drug run or murder over the... phone, much as I like to blame Telstra for everything, it's not Telstra's responsibility, and similarly, if they plan those things via email or the web then it can't reasonably be the ISP's responsibility...
http://www.theage.com.au/technology/technology-news/iinet-slays-hollywood-in-landmark-piracy-case-20100204-ndwr.html
http://www.theage.com.au/technology/technology-news/iinet-slays-hollywood-in-landmark-piracy-case-20100204-ndwr.html