1. Require other private citizens to listen to you, or agree with you
2. Require private corporations to broadcast your work or otherwise expend resources to make it available.
3. Give you free license to republish other people's work.
I mean, suppose I were to collect all of your Hacker News comments and publish them as "The Collected Works of Bediger4000" without your permission and without compensating you. Do you believe that should be protected as free speech?