The owners of these aircraft are hidden behind trusts such as Southern Air Consultancy at Bungay in East Anglia which is little more than a brass plate office.
Not all are.
Picking up on A and C,s point of the FAA’s willingness to apply the heavy hand of the law for those that flout their rules, IIRC their was a recent case of several ex US servicemen who had seen combat and were now civilian PPL holders, on their Airmen’s medical application they said they had no outstanding issues and at the same time ware applying for or receiving Federal benefits for claimed PTSD from the Veterans administration. They were indicted for BOTH making false benefit claims and also lying on their PPL medical application and are looking at serious jail time. The bottom line? the FAA have rules, flout then at your peril, they are no soft touch or laxed outfit regardless of where you are located.