I read the first letter, which basically said "getting lots of complaints that your name doesn't reflect your activities and is misleading, please give reasons why we shouldn't order you to change it".
I read the second letter, which basically said "youz are all biatches, and we are just poor parents having fun discussing vaccinated related issues and we don't have to change cuz you sez so". Not a single sentence devoted to explaining that the name of the organisation is NOT misleading, as required by the Government.
Third letter, basically says "thanks for that, um, as you didn't explain why you shouldn't have to change your name, we are ordering you to change your name or we'll deregister you, thanx, the Gov'mint." Wtth a lengthy explanation of how to appeal, should they get their sh*t together and come up with a coherent explanation of why their name isn't really misleading and stuff.
Blog sez, "they iz nasty bully boyz who are treating us unfairly because we are all about the vaxinashunz and stuff, and people haz a right to know that you don't need to get vaxxed."
Australia 1: Anti-vax nutters 0