They have a particular condition that makes them unable to recognize faces. But it's likely this friend is bothering others ...

Dear Miss Manners: I have developmental prosopagnosia, or face-blindness, and cannot recognize any human faces. I work ...

Miss Manners is beginning to wonder if there is a medical condition that renders people unable to notice that others run when they see them coming. The polite way to refuse to look at pictures is ...

Some table manners are sacrosanct and you ignore them ... I'm not in the dark ages, so I don't object to taking a few pictures of plates of food, which I do regularly for my social media.