Hey, heres a thought.
Y'know this 'air marshall' thingy going on at the mo, what about having a qualified MD double up as the Marshall on long haul/ ocean trips ???
Then he could shoot them first then fix them straight away!
He would be handy to have for other on-board emergencies too.
on a more serious note, wonder if an on-board MD could have saved any of the aforementioned unfortunates ?