DNS filtering or just shutting down the internet.
Look... if you aren't even that up to snuff on what the FedGov controls as far as the "information super-highway" is concerned... You litterally aren't worth talking to.
You seem to think we're still in the l0pht or CDC days of dial-up and truly annonymous internet. You are deluded, or just stupid, if you think anything you do isn't watched and tracked...
Don't need DNS. Access any node by IP and get a list of IPs of peers.
Shutting down the internet is ideal. But authoritarians like Chicomms want the internet up and the ability to honeypot, entrap, bribe, etc that comes along with it. Our own deep state wants the same. Even our shallow state tax authorities want blockchain access so they can trace all transations to the greatest extent possible.
Corpse: You are deluded, or just stupid, if you think anything you do isn't watched and tracked...
Watching and tracking everything is a given. The question was whether Bitcoin activity can be blocked. The answer is they can't (other than shutting down the internet for 100% of the population) and don't need to as long as they can track everything.