Personally, I feel it's the proper job of a mod to decide what kind of a community they want to foster, establish their rules to reflect those goals, and enforce accordingly. Not every online space has to be a wild frontier allowing the worst of online behavior. Furthermore, any person who wants such a wild frontier community on reddit or here is certainly free to make that community. If enough people enjoy hanging out with that behavior, then your community will be a success. And THAT is actual freedom of speech: make your community the way you like it, and see how many other people want to hang out with you. I promise, if I visit your community, I won't complain about being offended or aggravated.

Most of my experience with people complaining about lack of freedom of speech have tried to force their wild frontier self expressions onto spaces where civil speech is enforced or the topics to be discussed are tightly defined.