[vkou]

It's also 'illegal' for women to have their faces covered in some countries.

Does this mean that there should be no pictures of women on Facebook?

[witty_username]

It's upto Facebook what they want to do.

[jacalata]

Really? Where?

[vkou]

Burkas, burkinis in France. (It's a bit more complicated then that, hence the scare quotes.)

Depending on who you ask, it's either because of some hand-waved nonsense about public safety, or because liberal Western values include telling women what they can and cannot wear.