I'm a little confused about the topic of the thread--youth, street survival, or philosophy of effective MA techniques, since all seem to have made it in.

And admittedly, I didn't check all the links provided, so I may be totally off base.
But going merely from the thread title, my response would be in line with the bunkai revolutionaries (Iain Abernethy, Kane & Wilder, John Titchen, Bill Burgar, etc.), one of whose tenets is, every move must be able to end the fight. I think ending the fight is the goal, not whether it's with a fatal move.