Aussie communication minister Stephen Conroy told a Senate estimates committee Tuesday that the Great Australian Firewall could materialize as a voluntary industry code, rather than a new law. The controversial net nanny scheme was proposed as a means of censoring Australia from material like child pornography. But when the blacklists were inevitably leaked to the 'net, they were shown to include content like poker sites, Wikipedia pages, religious sites, ordinary pornography, and business sites.