Citizens have certain rights such as freedom of speech. Citizens also have certain requirements such as the need to obey laws. is your best choice.
While citizens can speak "most" of the things on their mind, they should also be mindful of others, and try not to speak harmful things. For example, Neo-Nazi's are banned, because their type of speech is hurtful to Jews, and the law is to bring first safety to all, then freedom.
Brown v. Board of Education of Topeka, 347 U.S. 483 (1954), was a landmark United States Supreme Court case in which the Court declared state laws establishing separate public schools for black and white students to be unconstitutional. The decision effectively overturned the Plessy v. Ferguson decision of 1896, which allowed state-sponsored segregation, insofar as it applied to public education.