Of course we consider people, but sometimes, you got to let the chips fall. If they're so concerned about dying, maybe they should collectively push to not have a madman in charge - their country, their responsibility. China's probably trying to keep the situation cool on their end, but if push comes to shove, they'll most likely make NK stand alone.
More sanctions? I bet we've sanctioned about as far as we're going to get. As long as madmen are in charge, we won't be able to reason our way out of this. What would you have us do if they attacked one of our ships? I'm not advocating throwing the first punch - technically, NK already did that by sinking the SK vessel.