Maybe journalists are acting in their own interests. Trump appears to be very hostile to journalists who are critical of him. Freedom of the press is their livelihood.
Just did the same test and I'd say it's auto play videos.
(same setup - current Chrome / current OS X)
I turned on auto play videos, killed the browser, waited for my headphones to turn off and went back into FB - scrolled down and when a video came into view, the headphones turned on.
Even though the video might have no sound, the html 5 video element still needs to allow sound to pass through. When videos auto play without side, it's not that the video doesn't have sound; it's just that the video has been muted until you click on it.
"The theft of wealth accumulation via property values and rent is far greater than the petty crimes of burglary and mugging that justify the police state."
>> "You are going to explain yourself, because this is quite backwards."
There are lots of other sources for this type of information. Ta-Nehisi Coates has a comprehensive explanation in his Atlantic article "The Case for Reparations." Inflammatory title (also long), but well researched.