Why don&#x27;t you drive a different randomised route to and from work every day and keep a log of cars you keep recognising in the rear view mirror, to detect government&#x2F;foreign intelligence spying on you?<p>Or: why doesn&#x27;t your car have an FIA compliant roll cage, a fire extinguishing system and six point harnesses?<p>Same answer: for you (and 99.9% of us), the costs outweigh the benefits.