Not possible. If all jurisdictions relinquish their claim over the satellite then it's open to being shot down.
The proliferation of space access goes both ways. LEO isn't exactly difficult to reach (many college teams can do it). GEO might work but then you need relays and any relay satellite are essentially tacitly complicit.
Satellite (and most aerospace related technologies) are glass cannons. They aren't defensible like a bunker or a tank.
What if you had lots and lots and lots of them? Maybe even enough to cause debris problems if they were attacked. With relays into countries that don't overreach their privacy laws.
if you can identify some country that is safe to relay to, why not just put it there?
> Maybe even enough to cause debris problems
Too late
https://en.wikipedia.org/wiki/Kessler_syndrome