Author here.
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As for the most recently (re)voiced objection (recordings), all I can do is reiterate my defense at the time of the original podcast: Any recording would also have the memory-erasing sound. I honestly believe that anyone listening to this for the first time couldn't resist listening to the entire thing and thereby hearing the sound; and, thanks to that sound, every time one listens to it is the first time...
Awesome!! I love hearing from the author!! And while I agree that most people would listen to the end of any recordings, I can't believe there wouldn't be some people who wouldn't get to the end for some reason (late for work, distracted by spouse/dog/children/emergency, etc.). These people would eventually figure out that everybody else who did get to the end of the recording had forgotten all about it. Then those rare people who didn't get to the end would figure out that there was something problematic at the end of the recording and start passing around an edited version.... At least that is what I imagine would happen.
Still a good story, though.