Difference is that software backdoors can effect billions of people. That driver on the road can't effect too many without being caught. In this case, had they

Difference is that software backdoors can effect billions of people. That driver on the road can't effect too many without being caught. In this case, had they been a bit more careful with performance, they could have effected millions of machines without being caught. There aren't many cases where a lone wolf can do so much damage outside of software.