Barnstorming on an Invisible Segway

Yep; I find the achievement, seeing past the tech to some social consequences, much more impressive than the oversight about the on/off switch.

I remember the phone company wanting you to sign a release for them if you had only one phone and wanted it on a plug instead of hardwired (so you could move it to different locations); they wanted to be sure you knew that you might miss phone calls, if you left it unplugged! They really wanted to install a separate hardwired ringer, so you'd know about calls even if the phone was unplugged. The concept of a phone being out of service just wasn't allowed back then. (Well, I'm remembering it from somewhat later.)