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danimal:
Besides, the court already has ruled that kids can't be compelled to say the pledge at all if it conflicts with their or their parents' beliefs (I forget the name of the case, but it's from the 1960s and hasn't been challenged to my knowledge).
Danimal, I think you are referring to West Virginia Board of Education v. Barnette from 1943. I remember having to study it for my American Consititutional Development course. This case was initiated by Jehovah's witnesses who do not want to say the pledge of allegance. It's the first major successful case where the power of the state to limit the actions of the individual was overturned for violating the equal protection clause. In simple terms, if something doesn't hurt you or others, the state cannot do anything about it.
Barnette has been cited in almost every possible social debate before the Supreme Court since as justification on both sides of the issue. Some we are familiar with: Boy Scouts of America v. Dale, Roe v Wade, and Lawrence v Texas.