Since we are passing judgment on other people's activities, I would like to know exactly where the line is.

Tablets and cell phones are bad. Sketch pads and pencils are good. What about ear buds and a radio? What about a novel? A comic book? A playboy (do they even print these anymore?)? What about the little pocket electronic poker games? What about an audio book? What about an audio book about hunting? What about songwriting?