I'm thinking that the safest and most bearable way to fly without electronics or liquids of any kind is to put passengers under general anesthesia prior to boarding, wheel them on, and bring them to consciousness at landing. No more seats--we fly on gurneys. Surgeon-like Sky Marshals can remain wake in case the pilots get out of hand. The night before travel, no food or water after midnight. Everyone's safe, boredom is no problem.
Or they could do it Phil's way and let us walk on.