Earlier quoted context omitted.
If your speech is really valuable you shouldn't depend on the free services of a privately-owned ad-supported company meant for streaming games to propagate it. Furthermore speech as the forefathers probably meant was people physically going to town squares and talking there. There is free press, which is what social media is more like, and the owner of a press has the right to decide what he/she will print--the Cons…
Just because you (and dozens of others on this site) continue make this argument over and over doesn't mean that it isn't a problem. Edit: someone built that town square. Someone founded those forums. At the end of the day, someone is always in control of something.
You can make an argument about whether or not people should have thicker skin, but you can't make an argument that people should not be allowed to react to speech without forfeiting the moral concept of freedom of speech.
Someone did build the town square, and if that someone was a private entity, that someone can kick everyone right the heck out of the town square, because it's theirs. If the people of the town want to make that reality different, they should probably band together and purchase the town square and own it collectively, as a government.
If you think Twitch, Twitter, HN or Reddit are such critical infrastructure, then you should lobby your government to purchase them.