First:
Quote:
On June 7, 2005, the U.S. Congress issued a Concurrent Resolution calling on the President of the United States to issue a proclamation calling upon the people of the United States to observe Cinco de Mayo with appropriate ceremonies and activities
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Library of Congress (U.S.A.) Declaration Retrieved February 6, 2009.
Secondly :
Quote:
§ Clothing, headgear, or symbols related to gang activities or clothing determined to be gang related by administration or resource officer
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schools dress code
So if the school can though the students were acting as a gang the school was well with in its right to make them change their shirts.
Furthermore, intent is very important to the American Justice system legally known as
Mens Rea, and to incite imminent lawless action is the a satute for curbing free speech in greater world (Brandenburg v. Ohio, 395 U.S. 444
(1969)).
But this is a school.
I remember high school; you were guilty till proven innocent, speech and expression where curb, you had no expected right to privacy .