This is a tired old argument and it isn't convincing or effective. There's a big difference between some kids screaming in your coffee shop and a community on a website supposedly dedicated to free discussion. A more apt comparison would be a group in a corner having a conversation at a rock concert. Suddenly this argument appears less apt.
And while some are screaming for these sites to get shut down over it, most of us aren't. What you see from most of us is recommendation to stop using services that silence you. This is a reasonable response, if someone doesn't like you, go somewhere where they do like you. That's what the comment you're responding to is advocating, embracing and even getting excited about. The internet needs a true public square, not a private entity masquerading as one that for some reason totally unbeknownst to them has to constantly remind everyone that they are not a public square.
And while some are screaming for these sites to get shut down over it, most of us aren't. What you see from most of us is recommendation to stop using services that silence you. This is a reasonable response, if someone doesn't like you, go somewhere where they do like you. That's what the comment you're responding to is advocating, embracing and even getting excited about. The internet needs a true public square, not a private entity masquerading as one that for some reason totally unbeknownst to them has to constantly remind everyone that they are not a public square.