Houston says these are rare, but has found at least one genuinely banal interrobang, used by a man named Frank Easterbrook. Chief Judge of the United States Court of Appeals for the 7th Circuit, Easterbrook used to be Deputy Solicitor General, arguing the interests of the United States in the Supreme Court. He is also a typophile, and has no patience for briefs written in Times New Roman, a newspaper typeface (he wants lawyers to use book typefaces).
In May of 2011 Easterbrook was writing a ruling for a case, the case of Sears vs. Crowley, when he realized he’d written himself into a corner. “I reached a point where I had written a rhetorical question where I was tempted to use, you know, “question mark, exclamation point, question mark, exclamation point,” he recalls. Then he remembered the interrobang. His clerks thought it was a typo, but he assured them it was quite intentional. It was also very, very banal — he wasn’t showing off and he didn’t publicize his usage.
Shortly after Easterbrook issued his opinion, his quiet use of an obscure form of punctuation was spotted by a legal blog and added to the interrobang’s Wikipedia page. When Easterbrook learned this, he laughed. He said he never intended to draw attention to the interrobang. He just thought it was the right mark to use.
Read more at 99% Invisible