Via the wonderfully worthwhile email newsletter katexic, we learned of the term “cellfish”:
cellfish (cell-fish) /SEL-fish/. adjective. Using a cell phone in a way that disregards others, such as loud-talking in a restaurant, in line while the cashier waits, &c. A portmanteau combining cell (phone) + selfish.
Beyond literally depicting this as people ignoring others on their device, can you creatively illustrate this? That means create a new image, not just googling for someone elses (as we have done below)