I just went to follow @Nugatory 's interesting suggestion. When I got there, I found that Wikipedia's interface for iPads, does not include a "talk" tab. When using a tablet, "you can't get there from here." Similarly, on a recent thread it became obvious that some of us were miscommunication about PF because the right sidebar does not appear on mobile devices such as iPads. Mobile devices also sometimes fail to render latex, video, or graphics information. I just wanted to point out this new kind of information divide. The Internet is becoming divided into "desktop" and "mobile" domains. The same information does not appear on both. If we are aware of that, we might avoid incorrect assumptions about what the other person does nor does not see. Since more people every day are using mobile devices and abandoning desktop ones, the problem will get worse before it gets better.