The sacrifice must enter of its own free will
So, people don't like what they see in the metal mirror, eh? Well, we both know which side is solely responsible for changing that.
So, this realtime zeitgeist modification engine that people are talking about:
a) - it exists, is run by evil corporations, and should be destroyed
b) - it exists, is run by evil corporations, and should be given to $trustworthy_unbiased_imaginary_algorithm
c) - doesn't exist, and shouldn't exist, because a)
d) - doesn't exist, and should exist, because humanity needs to be protected
d) - doesn't exist, and should exist, because humanity needs to be censored
e) - doesn't exist, and won't work, because objectivity isn't even a human thing, let alone an algorithm.
f) - doesn't exist, won't work, but will be forced to exist anyway, whereupon everyone and everything will fight over control of it, forever.
The only way you'd get anything approaching a reasonable filter is to tag sources and readers with their various viewpoint polarities, to keep dissonant realities apart, which would of course just create unchallenged singularities which would then tear at the fabric of reality, AND mean everyone just handed over their own psych profile.
I prefer the unvarnished truth, with polarity tags/magnitudes/controls, so I can make my own filter, which will never happen.