Recognize the difference between a
centralized score and a
relative score.
In the model I proposed, your "score" of anyone else would only be affected by people who you've selected to "score" others. This is exactly how people build trust mentally today, but assisted by a graph that lets you expand your trust network beyond Dunbar's number, which is required for filtering modern media.
The Dystopian centralized credit score seen in the Black Mirror episode "Nosedive" is what will happen if we fail to build something capable of calculating relative trust relationships.