If we're assuming independent hackers that simply have nothing better to do... Simply look at how many hackers do it already. If we're assuming hackers that re

If we're assuming independent hackers that simply have nothing better to do... Simply look at how many hackers do it already. If we're assuming hackers that realize they can lock down a person's car in exchange for ransom... Simply look at how many hackers do it already. If we're assuming a broad attack by a foreign entity... Simply look at how many hackers do it already.