From Wikipedia: A body politic refers to "the people of a nation, state, or country considered collectively as a body of organized citizens".
I don't accept personal responsibility for the Body Politic's safety. That's their responsibility. I do, however, take an active stance in ensuring that a person has a legal right to self defense. What they do with that right is their choice.
Would I defend a stranger with my life? Maybe. Depends on the situation. My default answer is "no", however I can think of situations where I would. It seems the line is somewhere in the neighborhood of stopping intolerable evil where I couldn't live with myself if I did nothing.
I do consider myself an active citizen however, for what it's worth.