> But soon, the average person might need to deploy surveillance countermeasures.
Already there. If you want privacy and anonymity online, you're looking at literal terrorist cell tier tradecraft. That means pulling up documents written by people from the "counterterrorism community" and "intelligence community" and learning how all of these "clandestines" operate.
Unlinking one's identity from one's actions and speech requires some serious OPSEC now. It requires constant, never ending effort. It requires perfect execution and discipline.