It is not hard to do a bit of shoulder surfing on a packed train. In fact it is hard to avoid even if you have your eyes fixed on your phone!
If I see a game on a screen or a movie playing then I am reasonably sure that that person is enjoying some down time rather than learning a part for a Shakespeare play, studying for their Mathematics degree or entering their tax returns.
If I see a game on a screen or a movie playing then I am reasonably sure that that person is enjoying some down time rather than learning a part for a Shakespeare play, studying for their Mathematics degree or entering their tax returns.