A fair enough sentiment, but let’s get more precise. What defines “arbitrarily”? And are there topics a site isn’t allowed to, or must always, censor? And who gets to make up that list? Is it just a matter of the site having a clear Terms of Service delineating what is allowed on the site?

This is always the problem with these discussions is the devil is really in the details. And the more we dig at those details, the more commonly the answers end up being, “the government gets to make a list”. And there are dangers in both prevented and compelled speech, when directed by a government. This isn’t to say that this can’t be the answer, or that it’s always the wrong answer. But, I think it’s an answer we should always treat with a healthy amount of skepticism. Government control of speech can seem like a great idea, when we agree with the government. It often becomes less so when we don’t.