I think that people who choose to wear the full burka's shut themselves out of society, if they do it voluntary or not it makes a statement you just can't get around. You can say of course that is is their own choice, so who are we to judge... but I think if you want to live in a society and use it's facility's you have to participate in this society as well (If your able to.) By wearing a full Burka you put yourself in a very isolated situation where integration is a very difficult thing to achieve and if you don't want that, then why are you here.....?
I work in a Photostudio in my free time and make ID photographs. I meet allot of people from locals to foreigners who are currently integrating ect. Sometimes they don't speak the language and that is fine if they at least make an effort to try and communicate. I've seen forigneirs who do their best to at least to say hi or thank you in my language and that makes me smile.... however I get shocked when I meet women who raises her kids here for more then 18 years and has become dependent on the language skills of her kid instead of trying to learn anything about the language of the country she living in. (These people live in my neighborhood so I know they have been here forever in their own bubble.) When I see a modern age girl of 4 years old who does not know the language of the country she is born in and is tucked away in a burka, I question her future and opportunity's.
I wish that I could say that I encounter as much foreigners from every random country and religion with these problems, but I'm sad to say that in my experience it's just not the case. I do not care if you wear any kind of religious garment a burka, headscarf, kipper or a turban for example, but what I do care about is if you integrate and at least try to be a part of society you live in......