I wonder, though, if they would be allowed to carry them onto planes, or into government buildings. Or even if they should. Even a one inch blade could puncture an artery, or take out an eye.
But even so, carrying such an item does not obscure ones identity. I'm not sure how you could have a "symbolic" covering that didn't cover the face, when many Muslim women are not permitted to show so much as an eyelash in public.