I don't really know what to think of this to be honest, is anything violent blocked basicially?
No, but there's no way to really know for sure since the censorship blacklists are secret. I've read that the leaked blacklists from other countries (e.g. Finland) have been found to mostly block legal pornography, though. They don't really know what they're doing.
But it's not the porn one should be concerned about; it's that immediately after this law goes into effect, they'll be knocking on Rudd's door asking for him to extend the censorship to include various other kinds of information. This is just the shoehorn.