Where it most definitely does not make sense is in passenger cars, where the moronic part of our population (that is, most of it)...
Why do you think having a bunch of morons behind the wheel is better than Tesla's half-baked "Autopilot"? At least with the Tesla there's something watching the road 100% of the time, rather than looking down at their phone. Even if it is flawed, let's not pretend that the alternative is perfect.
We did see the airline employees (and police) politely telling someone that, no, they could not take their loaded speargun on the flight with them as hand baggage.
The terrorists have truly won.
"An ounce of prevention is worth a ton of code." -- an anonymous programmer