Unfortunately (in the United States anyhow) citizens do NOT have a right to privacy. It is not listed as a right in the Bill of Rights nor in any of the ammendments.

A few Supreme Court judges have inferred a right based on other laws, but they've inferred it with a fairly narrow scope and most legal scholars, when pressed, will admit that there is no explicit "right to privacy" in U.S. Constitutional law.

All that said, you seem to be more interested in Australia. Do you live there? Does Australia have a specific right to privacy?

The fact that this privacy breach came out to public knowledeg doesn't imply this is the only event.
Governments all over the world keep penetrating civilians' privacy atall levels. Democracy is nothing more that a maskot, a phrase, or a term to keep the "public" relaxed, and thus manipulativable.

The only thing the "public" can do is keep posting such messages on bulletin boards, and hope for the best.