That sentence doesn't make sense. Do something about what? How those things collide? It's very unclear what the author thinks Facebook is supposed to do, or what he thinks Facebook is actually responsible for. Is this a call to regulate posts so there's no fake news, or more, to prevent all speech that can incite bad actions? In perilous regions of the world, sometimes people are arrested for their posts, and can be seen to be connected with others on Facebook, so that they also fall under suspicion. Is Facebook supposed to keep those users safe somehow? I mean, what's the author's gripe?
A better article would have mentioned that free speech, a "good thing," albeit sometimes dangerous, is powerfully fostered by Facebook. Give it some credit. It would also have been fairer if it had mentioned how difficult it is to detect and thwart bad actors who find ways to abuse any platform. (Removing trolls from small forums is hard enough.) Instead, it insinuates that Facebook is willfully indifferent. At least it isn't accused of colluding with the bad actors, as sometimes happens when US companies do business overseas.