I for one am going through quite a culture shock. I always assumed the nature of FOSS software made it immune to be confined within the policies of nations; I guess if one day the government of USA starts to think that its a security concers for china to use and contribute to core opensource software created by its citizens or based in their boundaries, they might strongarm FOSS communities and projects to make their software exclude them in someway or worse declare GPL software a threat to national security.
Not really, open source projects don't necessarily have to be open to all contributors and I was aware of this already. They have to be open to anyone doing what they want with the code, by definition, which is good, but they don't have to allow everyone to contribute to upstream. I'm not sure if there's any particular defence against this being used in a discriminatory manner, but I do think this effect is significantly mitigated by the decentralised nature of open source and the fact that it's not too uncommon for forks to become preferred over the original, the fact that open source projects rise and fall in popularity, etc.
I wonder if there's some way to manage an open source project so that it's not subject to particular national laws in this way.