Also not those things, much like real life. Renounce what is said in freedom (with good reasons) when you see it. Don't shove it under the rug and regret it grows around you when you close your ears. That is what makes freedom beautiful, not the enlightened few saying what's good to talk about and what's not.
That's the difficult part. I don't think there should be "complete" freedom, or "free speech absolutionism" - there should be no tolerance for intolerance.