Actually my experience is that fellow passengers were often intrigued by all the colors on the screen (from your usual syntax highlighting) rather than worried

Actually my experience is that fellow passengers were often intrigued by all the colors on the screen (from your usual syntax highlighting) rather than worried by the dark background! Unfortunately nowadays "Arabic" is what worries people, even if that turns out to mathematical notation. [1] [1] https://www.theguardian.com/us-news/2016/may/07/professor-flight-delay-terrorism-equation-american-airlines https://www.theguardian.com/us-news/2016/may/07/professor-fl...