This just happened to me the other night.
I’m in a dispersed camping spot in a National Forest. It’s not crowded. I go to sleep around 9:30PM and wake up at 4:30AM to someone parked right next to me. There’s no trees between us and no possible way that they did not see my car.
As I drive out of the forest I pass dozens of empty spots.
This has happened to me twice. Who are the people who do this? There’s no rational explanation for it.
Here’s something interesting, it’s cultural. There was a study done in the 80’s or 90’s and they found that Hispanics and Asians were more likely to sit next to each other in an otherwise empty room, whereas Caucasians were more likely to sit very far apart.