a favorite for conspiracy theorists in the U.S. has always been the FBI's supposed "Predator" program, which monitors all email, internet traffic, and any kind of digital transmission. supposedly it looks for keywords, like if i searched for "al quada application", or "how to build a nuclear bomb in my garage", or anything that has to do with hurting/killing some government official.
there are even some that say this system pushes further into phone conversations and library books check out, but i think its all bullshit.
i dont think any government would want to spend the time and money it would take to monitor all digital traffic for an entire country.
if you live in australia, and this does in fact go in to place, i would suggest you get everyone you know to search and view controversial material at every second of free time they had, just to overload the system. send out messages to everyone you can to do the same. show them how worthless this program would be.
if i'm wrong, then this post has sent a red flag to the FBI, so watch out!
=D
a side note: a few years ago, a kid in Minnesota (he was 16 or 17), for his Eagle Scout project, actually built a fully functional nuclear bomb in his garage. they made a big show of arresting him and confiscating it, but if they have any kind of sense, hopefully they sent him to the best schools there are and he now works for NASA or something.