You're conflating several different things here: civil liability, intellectual property, and a constitutional right to free speech without government interferen

You're conflating several different things here: civil liability, intellectual property, and a constitutional right to free speech without government interference. If you say something damaging to someone else (or violate their IP, I guess), and they successfully sue for damages, that's not the government limiting your speech, it's the government protecting the rights of someone else, because your rights don't trump anyone else's. Not being allowed to speak at a university isn't the same because you don't have a fundamental right to speak on other's property; in the same way that "freedom of speech" doesn't give you blanket protections for infringing IP, freedom of assembly doesn't give you blanket protections for trespassing. In both cases, the key point is that you have the right to say _what_ you want, but _where_ you can say it still needs to avoid infringing on others rights.