Oh boy. That will be really fun. Get DJI in to the mix of storing more information, and then having to transfer it to different aircraft. Even now, when they issue a Refreshed aircraft, half the time they dont update the contract with current information. If the FAA has to inquire from DJI who owns an aircraft, and then try to find him, thats gonna be fun.
Full scale aircraft tend to change hands alot less often than drones do. Tracking a tail number is as easy as looking it up. But if any authority wants to find out who is flying a drone, they are gonna have to wait for DJI to tell them who owns it, and then hope that owner still has it.
The only real way that this is ever going to work is with compliant pilots, who want the ATC to know their aircraft is there. For the rogue pilots, midair interdiction is the only prayer for at least 3-5 years to come.