I imagine it's someone that doesn't have the monetary means to rent or buy a plane combined with a bit of mental health issues.
At the uncontrolled community airport I got my PPL at there were a few pilots who were known to have expired medical certificates and long expired flight reviews flying planes that they owned that hadn't had an annual inspection in years. All older guys who had nothing to lose if the FAA found out and grounded them.
I'm not sure why the owner of that aircraft doesn't setup an alert for it's tail number on one of the many aviation tracking sites. Call the airport management, police or local FBO once he sees it on approach to land at some airport.
At the uncontrolled community airport I got my PPL at there were a few pilots who were known to have expired medical certificates and long expired flight reviews flying planes that they owned that hadn't had an annual inspection in years. All older guys who had nothing to lose if the FAA found out and grounded them.
I'm not sure why the owner of that aircraft doesn't setup an alert for it's tail number on one of the many aviation tracking sites. Call the airport management, police or local FBO once he sees it on approach to land at some airport.