This is actually an old problem. The value of free speech as a utilitarian goal, as opposed to being an absolute right which even the American system doesn't qu

This is actually an old problem. The value of free speech as a utilitarian goal, as opposed to being an absolute right which even the American system doesn't quite believe, is in having an unfettered marketplace of ideas. But if all ideas are equally valuable then there is no apparent value to truth and no consensus. You certainly wouldn't design a network protocol like that where nothing is allowed to converge. This sort of thing is glossed over in the regime of approximate consensus which holds most of the time in most communities, but when things get really divisive and intractable, or when there are deliberate adversarial attacks, I don't think there is a consistent philosophical resolution.