Is it the same? Showing a 404 is a security measure that applies equally to anyone lacking sufficient privileges. Ideally an app should prevent you from getting these, or show a message like "Not found, or no access".

> It's deceit with the purpose of stymiing further malicious action.

Shadowbans are powerful moderation weapons. Too much so, I'd say. The moderator is both prosecutor, judge and executioner. Who is the lawyer? Who revises after a time if the shadowbanned person has redeemed themself? Maybe their bad behavior was just a temporary fit, or even a mental breakdown they have since recovered from. Or they just become wiser grown-ups over time. All very human things that happen, but now they have a harsh sentence applied to them, and they may not even know about it.

Especially at scale these things should be handled properly. And importantly there should be transparency of how the procedures work, what the status is, and what one can do about it.

I also wonder to what degree on the big social platforms there exist even more subtle measures than all-out shadowbans. Like setting metrics on a sliding scale to define the extent the AI should limit a person's influence on the network.

Maybe this already has a name, but let's call it "shadow suppression". With such measures in place a person's voice can be dimimished for a lifetime without them ever knowing. They get a Like or a Comment here and there, but they will never go viral or even reach the audience that they think they address, and no matter how good their content and behavior becomes.