Earlier quoted context omitted.
I don't in any way expect that Twitter has reviewed a tweet for content and approves of the content therein. Equally so for Facebook et al. The platforms ubiquity makes them the Hydes Park / Public Square of the modern age- if anything they should be regulated to be content neutral rather than be encouraged to silence certain viewpoints.
That's just not true though when you consider that these platforms have algorithms that will determine which posts get more visibility than others (trending is the most obvious of these). I don't think this would be even half as much of a debate if we had an electronic platform that could actually be the modern public square of the US, but instead we have only private entities attempting to provide this, and they are…
We do! Buy a domain, point to your home server, and go to town. Any unlawful messages you spew will be met with seizure of your domain and/or servers, but otherwise you're free to promote or discuss any ideas you see fit.
If you're talking about a government-run social network, that's an interesting idea. I was actually talking about this with someone a few days ago, but with regard to a government run (or government funded) news/journalism publication that reported on facts (as opposed to felings and clickbait).
I think these government-run services would eventually become victim to people's calls for them to be removed...either they are too biased, or not biased enough. A social network in particular...I cannot imagine a social network built and run by the government that ANYBODY would actually want to use.