1. There is a vastly greater prevalence of drivers travelling over the speed limit than there are of airline hijackers.
1. It's trivially easy to distinguish vehicles travelling over the speed limit than hijackers. One might even suggest that speeding enforcemnt is significantly enabled by the ease, and low false-positive rate, of detection: speed radar.
1. It's trivially easy to distinguish vehicles travelling over the speed limit than hijackers. One might even suggest that speeding enforcemnt is significantly enabled by the ease, and low false-positive rate, of detection: speed radar.
The two situations aren't comparable.