All the what-if scenarios that manage to get posted boil down to a question of whether or not to get involved.
There is never going to be an end to the question of should you or shouldn't you get involved.
But there are a few things that can help decide. Gabe Suarez has a few comments that struck a chord with me - not that I agree with everything he has to say, but he does say it better than I've read in many other places.
Check it out:
http://www.warriortalknews.com/2010/...t-away.html#tp
If nothing else, I'm taking away "think with your brain, not with your sword".
stay safe.