With the news that communications watchdog ACMA has put some pages of Wikileaks on its list of banned links -- and threatened linkers with five-figure daily fines -- the fight against the compulsory internet filtering enters a new and vital stage.

Wikileaks -- the document repository attached to Wikipedia -- has published the list of sites banned by the Danish government, and these pages have been put on the blacklist, presumably as part of a worldwide compact, formal or otherwise, between national web censorship authorities.

Of course, the ACMA decision doesn't affect many people at the moment, only sites hosted from Australia. But should mandatory filtering be introduced, the pages would be blocked for everyone. As would the pages telling you which pages had been blocked. And the pages telling you the pages that tell you the ... and so on, a repressive tower.