Yes, this happened at least once before, when the Spanish government asked GitHub to take down repositories related to applications helping citizens to organize focused protests: https://github.com/github/gov-takedowns/blob/master/Spain/20...

The group that was focused in the take down requests was "Tsunami Democràtic", which you can find some background information about here: https://en.wikipedia.org/wiki/Democratic_Tsunami

Yes, the government considered strong cryptography to be a munition and said it was illegal to put the source code of PGP on the internet. Courts ruled against the government in Bernstein vs. United States, saying source code was speech protected by the First Amendment. That's why we can all use strong cryptography today.

https://en.wikipedia.org/wiki/Bernstein_v._United_States

See, for example

https://en.wikipedia.org/wiki/Bernstein_v._United_States

There is a long history of "the land of the free" carving out exceptions from freedom.