The big problem occurs when a government completely bans the headscarf and creates disparity between people. In France for example recently two girls refused to remove the headscarf and were expelled from the school. The European Human rights court ruled in favour of the French government. This as wel all well know will create resentment in the Muslims against the French government.
In Norwary on the other hand, some far right people are upset because the government made an allowance that women in police forces can wear headscarf officially. With pressure from the far right groups, the law has been repealed but bravo to the government for taking an initiative.
In Iraq, during Saddam's reign, women had a choice to dress the way they wanted. But now they are finding ot much more difficult due to the so called 'liberation' by the western world. The following is an extract from ABC:
People in the Ghazaliyah neighborhood in western Baghdad witnessed many assaults on women in 2007. "I saw a group of armed men. [Tthey] grabbed a girl and beat her before a crowd of more than 50 people along with her father for not wearing hijab, and afterward they cut her hair with knives," a man who identified himself as Eman told ABC News. "I was frightened and never left home for nearly a week."
A woman named Ibtisam, a 56-year-old housewife living in Baghdad, said that fear of the militiamen "drove my 23-year-old daughter to wear the head scarf. ... We did it for security."
The Hijab phenomenon, in the eyes of many Iraqis, can be linked to the influence of neighboring Islamic-ruled countries.You can read this article on whether Hijab deprives women or it restricts their rights and causes inconvinience.