Yes, and yes.
It's voluntary, and we allow them to operate as they have (and will). If anything's scary about Twitter or FB's success it's the extent to which people will share their lives with pretty much anybody.
Most things can be described as voluntary to some extent. No one forces you to open a Twitter or Facebook account, but there's an awful lot of professional and social pressure to do so. Meanwhile, you can choose where you live, although sometimes it's rather hard to call it a completely free choice. In the US, we broadly have the expectation that any organization that wields governmental power will refrain from most forms of censorship, but they are often allowed to place restrictions on time and place. For instance, your town is required to permit a public KKK rally, but they aren't required to allow it at a publicly-sanctioned farmers' market or a public library.
The FCC's authority to ban certain words and images is similar, based upon the premise that it's reasonable to set up a space that is safe from certain types of content for people who are sensitive to it, as long as they don't completely block those messages. I don't entirely agree with how they do this in practice, because they haven't been required to also make a space for people who don't want that protection in the public airwaves, and also because I don't think banning words that you will encounter spray-painted on the sides of buildings is really very effective, but I think that the approach is broadly reasonable, ignoring some of the particulars.
Correct. I joke occasionally that Twitter (I mean: seriously) and Facebook are where ideas go to die.:chuckle:
The things that really worries me is the subtle way Facebook et al control discussion. What they present as your news-feed, while it may be informed by choices that you make about what to follow, ultimately, they choose what you'll see using an algorithm that is secret, and you are likely mostly unaware of. I don't think most people are able to give informed consent to that level of subtle influence. By tweaking the algorithm one way or another, entire issues get vanished or greatly amplified for millions of people around the world, and none of them fully realize it. It's almost like giving someone control over not only what you read, but what writing you become aware of.
This isn't entirely new. The large media companies have done the same thing to generations of people. But the scale, and the consolidation is fairly new, and it seems to me like it's enabling people to live in curated bubbles their whole lives.
I've spent some time trying to design an alternative, something distributed, perhaps using a set of blockchains like BitCoin, where the software that makes the important decisions is open source and transparent and feeds are discovered via your network of peers without being influenced by a central administrator. I haven't figured out entirely how it would work, but I'd love to have enough time to do it eventually.