Again, if we’re talking about a free society, as I said there would be no such thing as “government-owned property”.
If you’re asking how we deal with these things in our current environment where such a thing does exist, well, that’s a different discussion…as I was under the impression we were talking about the “need” to ban or limit speech.
The reality is,
(a) there is no such need
(b) there is no legitimate, logically consistent way to justify it anyway.
Definitely check out The Ultimate Beginner meta-thread.