On Hubski we have a sort of guaranteed freedom of speech granted by the staff. It's not terribly dissimilar to freedom of speech protected by government. What seems to me to be lacking in places is the culture of free speech. It's certainly more prevalent here than many places, but there's most definitely a subsection of this site that's trying to block out content that they don't agree with. That's their right and they impact themselves more than anything, but they're still participating in that culture of shutting out dissent rather than using the generally amicable atmosphere to have a conversation where everyone isn't just nodding their heads or trying to bite one another's off. Personally, so far my experience with these people has been that they take disagreement as offense and respond as if I'd insulted them. They're a minority of the site's users, but they most certainly impact the atmosphere even when they remove themselves from portions of it.