In the early 2000s I couldn't download Winamp 3 at school because the URL contained the string 'mp3'. I'm sure the school did not care about the distinction.
The earnest answer is I wanted to play my ripped mp3s and recordings off the radio on my computer at home. We had slow dial-up and 4 kids fighting over it, but I had my own non-internet-connected computer and an early flash drive, and the school had fast internet.
