[walrus01]

For reference, what happens when you use "knock out gas" in a contained space:

https://en.m.wikipedia.org/wiki/Moscow_theater_hostage_crisi...

[dTal]

...everyone's reliably incapacitated, and most people survive? (potentially everyone with adequate medical care which was not provided in that situation)

That seems strictly better than shooting to kill.

[pavel_lishin]

130 out of 850 people died. That's a 1 in 6 casualty rate - about what you'd get playing Russian roulette.