How can one prevent the state power from simply eliminating the witnesses?
the community at large will decide to replace that particular witness address for someone else's.
hmm Rogier Eijkelhof 5% support... Community can't cooperate to replace witnesses

That is quite clear. A witness is as bad or as good as any other. One can also stay where one is.
If bite ball were a company that first has to earn its money instead of simply "printing" it itself, it would already be broke.
The bite ball dictatorship ticks however completely special. According to their agenda the user has to follow the given ideas. Criticism is either ignored or embellished.
Oh, not to forget some fanboys who also cheer this attitude on.