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Your first examples are all completely different. The government should not be able to punish the expression of ideas (usual caveats, calls to harm, etc...), no.

Beyond the government? It's just not that simple. The solution is compelled speech? If I run a company, I have to broadcast people calling for my death, for example?

Should Blizzard be forced to allow anyone to say anything on their show? What if someone starts promoting a competing product? How do you deal with who is allowed to demand airtime on their particular thing? What proportion of exposure are given bits of speech given?

I'm not saying there aren't issues with companies having control over speech—this case is absolutely an example of that—but you are pretending that compelling companies to allow any speech is simple.