The other thing that worries me is you don't see the opposition hammering them on this. It's clearly unpopular with younger voters, and it could be a good chance, to pick them up. But maybe it backlashes against others who don't understand the issues and just hear 'OMG child porn!'.
Bottom line : I seriously don't know where the push for internet censorship is coming from, and I have creeping dread that it is actually bipartisan.
I also think you're right that there is likely some bipartisanship on this issue and yeah that's pretty scary. But it's not really surprising is it? Considering the somewhat perfect storm of social conservatism that we seem to have all over the place right now. Conroy, Fielding, Xenophon, Abbott, Rudd, they all have that streak in varying degrees and must be only the tip of the ice berg. I'm just hoping that some of these guys maintain a bit of practicality and reason.
It's always the religious social conservatives who fret and worry that society is going to hell in a hand basket and it's their self appointed task to save the misguided and punish the wicked. That's the root of the push IMO and yep, it seems to be pushing up though both sides of politics pretty well right now.