I have no idea how this particular car got stolen, but if it was stolen from a KFC carpark, then the chances are that it was an opportunistic theft.
A few years back I saw a couple of security camera videos that showed guys hanging around in a gas station, waiting for people to leave their car unattended when they went inside to pay for gas. Then, you would see one guy sidle up to the car and check to see if the keys were in the ignition, and if they were, into the car and gone.
From that time on I made sure to always take the keys out and put them in my pocket when filling my car and going inside to pay.
Cheers...