Oldest version I can find is by "thepoeticunderground" as an image from 2017.
https://touch.facebook.com/e.h.thepoeticunderground/photos/a...
https://touch.facebook.com/e.h.thepoeticunderground/photos/a...
There is another mention of this earlier this year.
https://twitter.com/riojot/status/1268821579724541954?lang=e...
> My ISP-provided optical modem broadcasts a poem line every 10 seconds to my local network from address 00:00:00:00:00:12 using ethertype 0x8300 frames. Anyone knows why? It's simultaneously amusing and scary.