Remotely overriding safety controls
As seen in Season 1's "CMND:\Crash," it's possible to hack into all sorts of systems that impact public safety—including ones at theme parks. It's been just over a decade since roller coasters started implementing magnetized, evenly-spaced brakes that could hypothetically be compromised. The culprit could be somewhere on the other side of the world when they send their victims into a deadly crash. Fortunately, the federal government already has statutes on the books to dissuade homicidal hackers.