How do we ensure that they don't politically discriminate against people? What happen if they block you on facebook? At least if the government is doing somethi

How do we ensure that they don't politically discriminate against people? What happen if they block you on facebook? At least if the government is doing something I don't like I can vote for a different one, how can I influence facebook decisions? I'd rather have someone who must uphold the first amendment managing my money than someone who don't or even worst, will take the interest and demands of countries like China into consideration.