I can only comment from the information I read. To keep it simple, a vehicle accelerating away is not a threat. Certainly lights off in the driveway at zero dark thirty is very suspicious and something that should put anyone in condition orange, but I think this was handled wrong.
That said, on a tangent, it's interesting to me that in the comments here, some may think it's perfectly normal for a stranger to park in someone else's driveway to check their phone or whatever. I'm wondering if that is a regional cultural thing. Even back in CA, just pulling into somebody's driveway for something unrelated to the homeowner would be considered weird. Especially when the driver could have just parked in front of the home on the street.
The latter is considered perfectly normal and most would not bat an eye. But the ten foot difference between the street and the driveway is like the difference between somebody walking stopping on the sidewalk in front of your house vs walking up to your front door and hanging out there. Kind of a "personal space" thing. Maybe in other parts of the country people think a stranger parking in your driveway is no big deal?
This is all assuming the guy in the link has a house in a standard neighborhood with a short driveway right off the street, vs some longer road-like driveway to get to his house. Those are different situations for situational awareness. I have a nearly quarter mile "driveway". I've seen people pulled into my road just off the county road before and just figured they were checking directions or something as there is nowhere to "park" off the county road without blocking said road. I've never thought anything of it.
Once some drives all the way down that road to my house, I go into condition yellowish orange even if it turns out to be one of the local church ladies coming to pass the Word. I'm most always armed of course when outside, but during the day can generally see who is driving from a far enough distance to see if they look normal or look like a meth-head. At 0200 though, someone driving all the way down my road to the house is a clear condition orange situation. If it's someone "asking for directions" most of my neighbors are right off the county road, so why did someone decide to drive all the way down my road instead? It hasn't happened yet, but if it ever does, it's a long gun situation for me, and starts with driveway floodlights first. What happens after that depends on the person who decided to drive all the way to my house in the middle of the night. The sheriff is likely 30 minutes out. Maybe longer if my call is, "There's a strange car in my driveway" vs "Someone is trying to break into my house."
