> I'm leaning towards it being some extremely cheeky DCS/flightsim nerd because of the shortness and randomness of the flights. It screams "do it because I can and report back to the boys" to me.
It's not so easy to land a plane in real life, even if you have a lot of flightsim experience. It is definitely possible and there are people who have done it, but I don't think it's the norm. A lot of flying, especially landing, involves sensory inputs. Additionally, replacing the battery in that Cessna probably requires taking the cowling off. Not properly securing the battery or cowling may result in a bad time if something comes loose. Once again, doable, but you can do as quickly as you can with a car.
> I know literally nothing about flying. How does this work? Wouldn't the air traffic controllers see it on radar and try to radio it then call in the military (I've probably watched too many movies.)? Always blows my mind when I hear this kind of stuff in this day and age.
If you takeoff from an uncontrolled airport and stay clear of controlled and restricted airspace you don't have to say a single thing on any radio and no one will care about you. The controllers would see the blip on their radars but there's no requirements to check in with them (although it's generally a good idea) so they'll mostly keep other aircraft who they are talking to away from you.
Now, if you do fly into controlled airspace near an airport with a tower without talking to anyone, things will change. A slight excursion into the controlled airspace for a short time may go unnoticed, but the more blatant and prolonged the deviation, the larger the response will be. Fly into LAX's airspace and get in the way of their flights and you'll eventually get a visit from some friendly fighter jets. (There are some exceptions. For instance, there's a few narrow corridors through LAX's airspace that don't require talking to ATC. One of those corridors even goes directly over LAX's runways at a few thousand feet.)