Comment by danaris

As soon as you declare the possible effect to be effectively infinite in magnitude, you can justify any level of response to any level of risk.

That's not a sane way to do risk management. You have to be able to use common-sense human judgement as well as situational training.

And common-sense human judgement would tell you that, even if the possible effect is a plane full of people blowing up and that starting a war, the likelihood of that occurring because you didn't yell at a teenager to turn off a Bluetooth device is so infinitesimally small that it's not worth considering.