its not a matter of making a good enough solution. its that if we are to find a good solution it has to be effortless for users to update their trust scores after the fact. even to the point where they don't even know they are doing it

The best example would be un-following someone because they posted something you don't like and never want to see. thats a form of updating your trust score but without the user even thinking about it
because it doesn't matter how fancy the UI in the app is. your never going to get a user to look at a list of users and remove the ones they don't trust anymore