This is old news; researchers figured out how to do this years ago: https://chronicle.com/blogs/wiredcampus/mit-students-facebook-gaydar-raises-privacy-issues/

This is old news; researchers figured out how to do this years ago: https://chronicle.com/blogs/wiredcampus/mit-students-facebook-gaydar-raises-privacy-issues/8139 https://chronicle.com/blogs/wiredcampus/mit-students-faceboo... [Edit: looks like the article mentions this]