Written language contains many information signals beside letters and numbers. Here are a few.

A period is to let the writer know he has finished his thought and he should stop there if he will only take the hint. Art Linkletter, A Child’s Garden of Misinformation (1965)

To a generation of children who are trained to be sensitive to an ever-increasing body of words deemed offensive because of their perceived meanings, who are “triggered” by these words and need “safe spaces,” it is, for  the P.c., just a small jump from reading new meanings into words…to reading new meanings into marks of punctuation.