3rd June 2008, 7:11 AM
That's about the way I see it, though in the case of a baseball game it's not so much something required by law as it's just tradition. To the best of my knowledge, that anthem is sung out of free will by the people putting together the game rather than being forced on them by some authority.
"On two occasions, I have been asked [by members of Parliament], 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able to rightly apprehend the kind of confusion of ideas that could provoke such a question." ~ Charles Babbage (1791-1871)