Read full article here:
https://medium.com/@filip.poutintsev/if-we-ever-build-human-reputation-program-how-should-it-be-done-14edf89b40e1
you cant really build a trustworthy one in the longterm, someone with good reputation somewhere will have a bad reputation somewhere else.
good and evil, right and wrong are in the end just worths, someone evil can be someone elses good, etc.
a reputation programm also cant forsee the future, or forsee the future trustworthyness, it can maximum draw down what happened in the past.
will be quite though. additionally you will get issues because you might end up with privileging the privilged discriminating the unesteblished.
regards