So the answer is no, you don't know anyone who can't read the text.
People post all kind of things online, especially hyperbole. As one of the other FAQ questions notes a lot of people also complain about their eyes bleeding, but this has never actually happened.
I once worked at a place where we shifted some content from a two column layout to three columns. We had users telling us it was literally giving them headaches and making them feel ill. This despite the fact that it now looked basically like the rest of our content. You absolutely cannot take all user complaints seriously.
People post all kind of things online, especially hyperbole. As one of the other FAQ questions notes a lot of people also complain about their eyes bleeding, but this has never actually happened.