Well, they both already are protected. Being a bully isn’t illegal. But Twitter and Facebook are businesses, and their “storefronts” are the websites—they have some say in who they allow and don’t allow, in what behavior they will permit—so long as their decisions aren’t discriminatory.
Cyberbullying can get fairly vicious, some of the most extreme cases being demands that the victim just kill them self already, etc… and given the ease at which cyberbullies can attack a victim silently and anonymously through those sorts of avenues, I think it’s perfectly reasonable for those companies to try and stop that kind of behavior. They can’t control what the bullies do outside of their perimeter, but they don’t have to be bystanders within their perimeter.
Cyber-hate speech… aka trolling… so long as it doesn’t cross the line into threats, I think companies probably should allow it to remain… I think we probably need more practice at figuring out how to diffuse that kind of heated rhetoric—target practice, I guess. At least in the US, it seems to me that right now we have a president elected at least in part because of that kind of heated rhetoric. Learning to better diffuse it seems quite necessary… Of course, the social media have been cultivating ideological bubbles on respective their sites—what content they present to each person, etc.—because that’s what they think people want, probably because that’s what people have acted like they want. It’d probably take some time and persuasion to get the companies to think otherwise.
I do think companies have a responsibility, or at least ought to have a responsibility, to be more transparent with their business practices… And the things that come out about the way Facebook curates the content it presents to users concerns me… At the same time, I suppose if we had a society better at determining source credibility, the recent “fake news” hubbub wouldn’t have been as big of an issue, at least.
And then, because PC language was mentioned and this has been a bit of a sore-spot for me recently… I don’t think there is anything inherently wrong with the efforts for so-called “PC” language choices. In its best manifestation, it’s asking us to consider the unfortunate/outdated/prejudiced connotations lurking in the words we choose, and to either find a better word, or to work at raking away the unwanted connotations. Sure, sometimes it can get roped into people’s efforts to shut down an unwanted conversation, or to peg people into certain holes—but the roping and the pegging are nothing new to humanity, and are certainly not caused by seeking more precise, less assumption-laden, less inflammatory language. (As far as being “politically correct” is choosing euphemisms or vague language to hide unpleasant truths—the way the term “political correctness” was used when I was growing up—I agree that’s not helping anyone.)