Also, blockchain is SAID to be uncensorable, but this claim has not been put to the test. It is actually likely quite possible. Stuff is impossible until it isn't.
You are correct that more work needs to be done to harden the network I think. Make sure it can't be easily filtered at the network level. Something like TOR.
It may be that simple hardening is sufficient, but I doubt it. The social aspect of this has not been tested under pressure. What if miners find more profit on state sanctioned chains?
Miners are definitely a weak point in the system.
