Have many of the posters in this thread suddenly converted to libertarianism?
In a society, a great deal of laws already exist that limit individual choice for the benefit of the society at large.
Take firearms, for example. There are undoubtedly people that would like to own guns, for entirely personal reasons and they would have no impact on anyone else. Plenty of gun owners in the US are completely responsible, with no negative impact on anyone else due to their gun ownership. However, inevitably, there are those who are not responsible, who do have an impact on society and as such many nations choose to restrict gun ownership to prevent crime, gun deaths and mass shooting and so on. For those who would be fully responsible gun owners this isn't fair, they are losing out simply because other people can't be trusted. However the people of these nations still realize that the costs to those who cannot exercise freedom to own firearms are fully outweighed by the benefits to society of restricting ownership.
One might say that guns are completely different since they can actively harm others, but you could just as easily make the same point with various illegal drugs. Heroin, or Ketamine or such like won't directly affect others but are still restricted. There are probably people out there that could take such drugs, fully aware of the risks, in a very controlled and careful manner and not come to any harm, but because there will inevitably be those that do harm themselves, the drugs are made illegal.
A burqa ban ends up the same. A handful of woman might wear them entirely of their own choice and prefer to have the option. But, on balance, the small cost to these woman of not being able to wear it is completely outweighed by the benefits to the many woman who do not choose to wear it and have a slight increase in freedom as a result.
So unless there are a great deal of posters who suddenly like the libertarian position that everything should be legal and available, I believe a number of people are probably somewhat hypocritical.