-=jd=- schrieb:

...which clearly states (as the first example given)
that discussions about shortwave broadcasts is on topic.

Yep!
Discussion about *broadcasts* and NOT about *_content_ of broadcasts*.
Every content you wish to discuss you can find for sure a specialized
newsgroup for.
Except the content itself is focussed on the own or others transmission
like dx/listeners-information or broadcast schedules etc.
You want to discuss on the content of the numbers-stations, right?