You can see this at work already with existing services. Random example, check out the satellite coverage map here:
https://www.united.com/web/en-US/content/travel/inflight/wif...
Note the distinctly China-shaped hole in East Asia.
Quote: "Please note: Satellite coverage may experience outages for reasons such as government regulations"
I guess this is intentional because China may retaliate against violators (e.g. prohibit fly-overs).
China is iirc (one of) the biggest Bitcoin usage countries.
> They could also use detectors (or jammers)
Jamming doesn't work with a proper directional dish, and detecting who in the country surfs via satellite doesn't work if there is proper encryption on the air protocol.
https://en.wikipedia.org/wiki/Geosynchronous_satellite#Defin...