This caused a variety of problems. While the system can't shut down cars that are already in movement, anyone who was driving to work and stopped to buy a falafel suddenly found themselves stranded in the middle of the street. It took two days for Texas Auto Center to figure out what was causing this -- in the meantime, people missed work, missed school and had to spend money on tow trucks because of a jobless IT guy with too much time on his hands.
They should feel lucky that he didn't activate "self-destruct" mode.
Employees at the dealership first noticed something weird was going on earlier the same month, when they were billed for $130,000 in GPS equipment no one remembered ordering. Also, Tupac Shakur had apparently purchased a 2009 vehicle from them, which would require either a time machine or enormous forethought on his part. Turns out Ramos-Lopez had been going over the company's database, changing names and messing with the records like a common Wikipedia vandal.
Eventually, the police tracked down Ramos-Lopez's IP address and charged him with breach of computer security and with being a dick. Which would be a terrible injustice if it turned out Ramos-Lopez was innocent and that Tupac's ghost was responsible for everything.