Privacy cannot be accomplished alone, it inherently requires a group effort to be attained.
Privacy is a complicated subject. It's not always a simple binary thing, private or not private, seen or unseen. Seen by whom? Private from whom? Private to what degree? If you are walking down the street with a mask on your face no one can see your face, so that means you are private, right? What if you are the only one wearing a mask? Are you private then? People might not be able to see your face, but they can see that you are the only one wearing a mask.
