Earlier quoted context omitted.
"Then why not have garlands of frag grenades hanging on the ceiling as part of every bank's security system?" Because that would have significant side effects. Since parachutes are pretty much useless on airliners anyway, no significant side effects from banning them.
Which airlines are you flying that seem to have ridiculously spacious cabins?
Re: Ask HN: Why do airlines still use "black boxes" ?
#91I don't understand why you're asking me that--I'm not the one arguing for parachutes.