When I was about 10, someone lent the school a tape of Holst's The Planets for a school play, one of the other students pressed the record button, and shortly thereafter the teacher played to the class a recording of me shouting "no stop" as I rushed for the stop button having seen what they'd done just a moment too late.
Now imagine that happening by undocumented feature, where nobody knows it would happen before it does.
Though I'll admit, when I used to use cassettes, I never write protected them
One time my older sister and I got into a fight and to get back at her, I erased side A of her Michael Jackson's Thriller cassette she had just gotten a few weeks prior. She got it replaced at the music store and the salesperson was completely befuddled by the entire situation. That one day the music was there and the next day just gone? Inconceivable!
I just played stupid at the time, but felt like a god knowing that little trick. So, sorry sis. But John C, you were the man.
Music back then wasn't cheap.