I've noticed that when systems like this are brought in, the bias in marginal cases is always to denounce, censor and demonetise. After each marginal case the bar is set slightly higher, meaning that over time the system will trend towards censoring even controversial (but nonetheless legitimate, not-fake) stories. This means that eventually there will be a hollowing out of Facebook's ad revenue as more and more becomes censored. This is a mathematical and social principle which has repeated throughout history. Facebook stock is already over-valued so it won't be long until they become insolvent. All it would take to catalyse this would be for a competitor social media platform to emerge...