@Hyolobrika @Moon to make it more than a quick reply, rothbard thinks that all rights come forth from property rights, originally from the rights to your own body. "Free speech" is only a concept in a public sphere, which doesn't exist in a purely private society. So he'd say (and I'd think so too) that from a rights perspective, you can say what you want on your property, but not on others property (and that's what most people follow in IRL life).