Facebook's massive, secret rulebook for policing speech reveals inconsistencies, gaps and biases... A Message from Yahoo Search What is psoriatic arthritis? Look for symptoms, causes & more What is psoriatic arthritis? Look for symptoms, causes & more The rulebook's details were revealed Thursday night thanks to a Facebook employee who leaked over 1,400 pages of the speech policing rulebook to the Times because he "feared that the company was exercising too much power, with too little oversight — and making too many mistakes."