Yes I have -- and I've decided that for purposes of governing my conduct, in nearly all circumstances, my duty to my own family unquestionably takes priority over my duty to an adult stranger's family.

EDIT: And so there's no confusion, I would expect the same if the roles were reversed -- if I were trapped on a railroad track with a train bearing down on me, I'd be really pissed if some other dad (or mom) were to put his own life at grave risk to try to save mine. Just because circumstances are about to inflict a loss on my family doesn't justify his risking the same for his.