Honestly I think the rate should've dropped by 2 or 3 whole percentage points (so like 200 or 300 basis).
The current rates are OBSCENELY HIGH and have not halted inflation even if they have attenuated it to some extent.
The Fed likely knew this damage would occur from this kind of tampering and only now are they acting to curb it.
The filtration capabilities available to most users is pretty robust; depending on what you use to interact with the Fediverse. I thinik it would be possible to filter out problematic bots, users and even whole domain sources with the right kind of software.