FB is both though. They built the system & tech (the ‘radio’), and via their algos/policies also control what gets spread and to what extent (the ‘broadcasting’).
It’s not at all clear cut.
Now, consider that it's common across South-East Asia to have very basic data plans that allow you to navigate Facebook for free (or at heavily discounted rates). https://www.mmtimes.com/business/technology/20685-facebook-f...
For a huge lot of these subscribers Facebook is the Internet.
People in the developed world who after gone through innumerable Internet phases and fads, and who presumably have more experience and a better sense of its subcultures, still have a hard time to distinguish fake from legit news.
How do you think a small towner in Myanmar who went from zero to Facebook overnight would fare?
>Radio Télévision Libre des Mille Collines (RTLMC), which broadcast racist propaganda, obscene jokes and music, becoming very popular throughout the country. One study finds that approximately 10% of the overall violence during the Rwandan genocide can be attributed to this new radio station.
https://en.wikipedia.org/wiki/Rwandan_genocide#Preparation_f...
https://en.wikipedia.org/wiki/Radio_T%C3%A9l%C3%A9vision_Lib...
The two founders and one announcer were sentenced to life, subsequently ~30 years in prison, the people who built this particular radio and the broadcasters together
The people who built the radio didn't get called before an international criminal tribunal; it was the broadcasters who did.