You're invoking a common "libertarian" trope, so I'm going to address that larger topic. Right-fundamentalist (ie axiomatic) "libertarianism" is fallacious. Logically, by asserting an unlimited "right" to contract, one can straightforwardly reframe any totalitarian state as merely being contracts between the state and its citizens/subjects/victims. And simply renaming things clearly does not make for a society that respects individual liberty!

The only sensible way to approach libertarianism is to qualitatively evaluate individual liberty. And being prohibited from speaking 8 years after the fact, especially when there is a compelling public interest, is in no way equitable. If they want her continued silence, they should have to buy that on the order of year to year.