Not sure how would that actually increase privacy, other than increase chances of getting dick pics in your inbox (unless that was the goal). 
Sad truth! If anyone wants to see dick pics they must identify as girls…
He thought that anyone would believe he is a girl so in real life nobody would suspect who he really is. But I don’t like this of course.
However, what’s your take on the initial question? You are right that everyone on the web is a man.
But what do you think about my initial question?