There is no right to free speech. If you believe in the right to non-aggression, you can not consistently also believe in any other right, because at some point that right is going to conflict with someone’s right to non-aggression. And if you believe in “rights” that can conflict with the right to non-aggression, then you don’t really believe in the NAP. The only way to coherently uphold the “right” to free speech is to advocate that the NAP be violated. The only way to enforce free speech is to violate the NAP. Violating the NAP in the name of positive “rights” or some greater good is basically just a high level description of what a government is.