If you want to talk about legal responsibility for their deaths, you should charge the hostage takers with murder under the felony murder rule. If they hadn't taken the hostages in the first place, they never would have been in harm's way.
Betteridge's law of headlines at play!
There's no faster way to deliver a nuke than a SLBM on a depressed trajectory. Until this is not the case, nuclear-powered attack submarines (which can stay submerged for months at a time) will be indispensable to a nuclear-armed nation.
The whole point of getting people into an office together is so that they can communicate and get work done faster than if they were all telecommuting. I think headphones hurt that, it's annoying to have to tap people on the shoulder to ask them something.
Obviously you shouldn't bug people if you don't have to, but this applies with or without headphones.