
In 1914, because her family cannot afford a train ticket to her grandmother's town, May gets mailed and rides the mail car on the train to see her grandmother.
https://www.amazon.com/Mailing-May-Michael-Tunnell/dp/006443...
Technology is complicated and only getting more so. Even a tech savvy person can be surprised by something new in tech. Some techniques that can be used to exfiltrate data from an air-gapped system could still sound crazy or leave you surprised. But it's a different kind of surprise, not that you can't believe it's real, more that you can't believe someone thought of using it that way, or that tech evolved to the point the thing became possible.
I was thinking more of stories like this one [0]. Sounded exactly like a story used to bamboozle young'uns until I realized it's actually true. Stories from behind the iron curtain told to people from the other side of it sometimes sound equally crazy even without the generation gap. A cultural/societal gap is enough.
Tangentially related: Duchesne, Utah, wanted to build a railroad station, in the hopes of attracting a railroad. They mailed the bricks for the station to the town, because mail was cheaper than freight rates on wagons.