[crazygringo]

> It is, almost literally, the worst example that you could use.

But it's the one everybody knows. Society has chosen it as the common term for the concept by now. Its original source or accuracy is entirely irrelevant -- in the same way it would be missing the point to complain that "black holes" aren't technically black.

After all, we're not having a discussion between lawyers about the intracacies of US free speech law. It's just a phrase for referring to the general concept of rights not being absolute.