How some men always seem to want to dictate to women what they should and shouldn't wear. Be it from any culture and any faith. I have friends married to Muslims who's husbands say that should they decide to wear a hijab and/or niqab they will divorce them! Why? Cos they cannot present them to their friends!
There was once this guy, again a Muslim, who came up to my hubby and tried to convince him to get me to remove my niqab using all kinda excuses.ROFL like he(my husband) has any right to order me around and also considering I got into niqab, by my own free will, waaay before we married!

Men wanting to either tell us to expose or to cover up, and the excuses they use to disguise their attempts to control us is laughable. And if Muslim men can do this how can we expect all non Muslim men to react better. There will obviously be male chauvinism from all faiths.

With regards to security in all honesty yes there maybe people who might adorn a niqab for nefarious reasons BUT in the same token they can also chose other means of going incognito should the veil be banned.
Besides a Muslimah should always be willing to show her her face should the need arise like in banks, visa offices, rulers' offices etc.
Hope and pray the problem in Australia are resolved as I know many Muslims have resided there relatively peacefully all this time.