Hi,
If I may, I'd like to offer an alternative interpretation. To me, the concept of "live free or die" contains not just a battlecry of defiance, but a philosophy to be undertaken in all points of your life.
Essentially (and I apologise if I don't quite get this across clearly), the idea of "living free" implies an ethic of unrestricted thought and ability to enable your ideals into reality. By not hemming yourself in with various conditioning and limitations, you are free to explore all that your potential can allow, however, by allowing others to encroach on your decision-making and personal beliefs, you "die" internally, whether intellectually (by limiting your personal education, expecting others to spoon-feed you information and delegating to them to make your decisions), or spiritually (not just in regard to religion, but the small death of the soul as the light and life is smothered and snuffed out by the blankets of repressing external personalities). In this sense, the idea of "live free or die" is not a call to arms against any who threaten our percieved liberties, but the deaths of the souls, the arts, the intellect and spirit of a community and society as it becomes more and more anaesthetised by it's members shrinking away from individuality. This is the biggest problem with the politically-correct idea, in that it robs a mind of it's freedom to be itself. The recent case of young Miss California, and the responce to her story is just one example.
But, to get back to the original idea of this thread, yes, you should be certainly prepared to fight for your freedoms, otherwise you really will never respect or value them for what you have. And having the courage to flee to protect the freedoms of yourself and your loved ones is another expression of the same.
Oh, by the way, the above interpretation relies rather heavily on the person in question having clearly defined ethics and morals; without them, you are a sociopath who has no true freedom anyway, simply a removal of social limits. That is a very different thing.