No I don’t agree. “Norms” are separate from the legal context you gave.
If no coercion took place, that doesn’t make what the FBI did “ok” even if no laws were broken.
Like my earlier analogy, if my local cops started asking businesses to kick people out (and the businesses agreed) that’s a major problem, even if not illegal.
Law enforcement’s job is to identify crimes and arrest people.
When their scope starts expanding into working with willing private companies to silence individuals who have committed no crime, that should worry everyone, whether it happens with Twitter or your local bar.
It’s amazing to see a normally anti-law enforcement HN suddenly rally to the FBI’s defense.
The problem is that people are getting at the FBI for the wrong things. They should be getting mad at the shutting down of Z-Library instead, which holds far more impact for far more people than the two dozen accounts discussed in the OP (who weren’t even all suspended). When people are concerned about petty crimes, the big ones get unnoticed.