LMAO!!
An economics professor at the University of Pennsylvania was profiled and interrogated this week while sitting on the tarmac on an American Airlines flight to Syracuse...all because his seatmate became concerned about the "foreign lettering" he'd been scribbling on paper next to her. That foreign lettering, it turns out, was math.
http://gothamist.com/2016/05/07/ivy_league_economist_interrogated_a.php