Where has the practice of sending screen shots as source code come from?

[John Ladasky]

On Sunday, January 28, 2018 at 7:07:11 AM UTC-8, Steven D'Aprano wrote:
>
> (The day a programmer posts a WAV file of themselves reading their code 
> out aloud, is the day I turn my modem off and leave the internet forever.)

What's a... modem?