Are The Dixie Chicks Really Free Speech Crusaders?

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Are The Dixie Chicks really free speech crusaders or is it a marketing ploy? They've painted themselves as heroes, but are they? Free Speech does have it's limitations. You don't yell fire in a crowded theatre, you don't walk up to a steroid case and call him a sissy, and you don't tell your girlfriend that her friends are really cute. What do you think?