It seems to me that all of the of pro-headscarf wearing posters are writing from an educated and independent woman's view point. Yes, in the West, it is our choice to bare our legs, arms, head (or even boobs!) wear make up or heels, cover up from head to toe, or any combination of these. I have seen many a hijab-wearing woman with full make up, heels, jewellery and colourful clothing...so, over here, wearing a headscarf doesn't necessarily equate to being invisible to men, or hiding their identity!
We are lucky enough to be allowed to learn about other religions and cultures, we have a right to education, higher education, a career, contraception, health care etc. My concern is for those woman and girls who are forced to cover up, here or abroad.
From what I have read (Reading Lolita in Tehran, and I am Malala are worth reading), women in most Muslim countries used to be able to wear pretty much what they wanted, although more modest/traditional than the West, but are now being forced to cover up, abstain from dancing and singing and are being denied an education and a career and are treated as second class citizens. As a mother of two daughters, that's what I object to.