There’s an article about how only jerks bother pointing out typos. It used a harsher word, actually, to describe typo Nazis.
“Researchers concluded that ‘less agreeable people are more sensitive to grammatical errors, while more conscientious and less open people are sensitive to typos.’
“Overall, extroverts were more foregiving of both types of errors, and introverts were especially harsh about messages that contained typos. ” Not incidentally, the article is intentionally filled with typos.