What about moderation vs free speech? Free speech is the ideal, moderation is the antidote to excessive and extreme forms of speech.
I think the key is to programmatically design a moderation system that strikes a balance between free speech and censorship while empowering communities to moderate themselves as much as possible. HackerNews is a decent example of the latter. HN has systems in place [1] which allow for the community to moderate itself quite well without the need for intervention by a mod/admin. This is very important for shifting control/power towards the community rather than mods/admins. It's one of my favorite aspects of this site. Besides that, I think implementing elements of democracy into this system would also be very beneficial. Communities should be able to vote to elect, remove, or otherwise modify existing moderators. The issue will be doing this in a transparent and verifiable way that cannot be manipulated.