Is this really a problem so dire that it needs to be addressed in such a dramatic manner? How often do the authorities know for sure which car it is they need t

Is this really a problem so dire that it needs to be addressed in such a dramatic manner? How often do the authorities know for sure which car it is they need to stop in an emergency situation? And if it's not an emergency situation, this seems like an overkill solution. Also a dangerous one (how do you disable a car safely travelling in traffic?), open to abuse by authorities, not to mention a huge and juicy target for criminal hackers.