In Indonesia anthem and flags are also a revered subject. There is a subject at school that if literally translated became "Citizenship Studies", where you study the government system, how the parliament works, citizenship laws, dissecting the constitution, and some sprinkle of indoctrination about anti-communism etc. I have to say this is quite successful in shaping average Indonesians way of thinking and their thought about national symbols, resulting in often overproud sentiment (and refusal to stand when asked to stand for other countries' anthem while singing our own anthem like mad).
Back at high school, my "Citizenship Studies" teacher is a perfect model of "making a really big deal of anthems and flags". She criticized the Jehovah Witnesses in our school, getting mad if she caught someone singing the anthem wrong, angry because during a flag hoisting ceremony there is a few centimeters gap left at the pole (not "fully hoisted"). Guess she can be famous in the US