They will be displaying the petition in a massive ad in The Australian on Friday so they want as many Australian names as possible on it.
It's not too late to stop this descent into a nanny-state. Net censorship will affect you; it will slow down the internet and at the very least FChan is on the list of "objectionable" domains that will be blocked. And it will not succeed in its supposed aim of protecting children (how many times have we heard that excuse for limiting the freedoms of adults?).
For more information go to GetUp's campaign website. You can watch a clever ad here.