Internet snooping by cops is a double edged sword, sure it can be used as a tool of oppression (if the political climate is ripe) but it has also been used to solve some high profile murder/rape cases. In the Jill Megan (sic?) case the cops didn't spy on anyone, they simply explained the situation to the banks (on the weekend) and the banks voluntarily gave them what they needed to track the bastard down.
Disclaimer: I have a female cousin who has served in the Victorian police for over 3 decades. I'm not claiming all Aussie cops are saints, but certainly the vast majority have their heart in the right place and are doing a tough job as best they can.