So they're free to discuss their beliefs in their home, car, church, coffee shop, and grocery store; but not in the public square or on the radio or via Twitter

So they're free to discuss their beliefs in their home, car, church, coffee shop, and grocery store; but not in the public square or on the radio or via Twitter? How do you prevent the former from overriding your efforts to restrict the latter (word of mouth is the best advertising, after all)? If this censorship is to be absolute, how do you restrict the former? I'm not trying to be facetious or obtuse, I actually don't see how this could work. Speech is a natural right, i.e., I can speak (or not) *any* thoughts irrespective of the presence or permission of government (albeit not without consequences post-hoc). Any attempt to restrict that right proactively must (at least) border on tyrannical, and that's before we even get into how it would be decided which speech is acceptable and which must be censored. After all, even the example subject we're building this conversation around has at least two extant, incompatible definitions.