Bee-dub said:"It depends on what you mean by "Die for."

And specifically, whether you know that you will probably die due to some action or situation.

49 years ago, I faced 2 policemen on a dark street in Hattiesburg, Mississippi... (for about 5 minutes).. while walking with some young black kids on the way to a civil rights meeting. In similar confrontations in previous years... and subsequent years... very bad things happened to others while supporting the cause we were there for.   
In a 2nd trip, a few months later to McComb, we stayed in a house where, from the window, we could see another house that had been bombed a few months earlier. During that trip, I drove a car in order to keep the guys who were there for the long haul from being harassed and being charged with one more fake traffic charge. Could there have been an 'incident'? Maybe.... there wasn't.
Nothing serious happened to any of that little group that 1st night, either.... we walked on to the meeting after identifying ourselves. But in the back of my mind I knew that "things happen" that you cannot always predict.

Would I have put myself in that situation KNOWING that I was likely to die? Probably not... I doubt that my death would have directly served any clear purpose.... but I knew there was potential danger to the entire trip, even though 'things' were at a kind of lull and we were not there when emotions were at the highest.

Of course I would give my life for certain situations involving my family, my country- if attacked, or to overtly DO something to directly further certain causes. This is different from what Amos called "Becoming a random martyr..".

I hope I never have to face that decision......