N410DC

Back when I was a probation officer, I requested hundreds of arrest warrants for people who violated probation. One of the Courts I worked with never ordered their law enforcement officers to search for, apprehend, and arrest these individuals. They simply waited for them to get pulled over for an inoperative tail light, or to have some other encounter with an officer (e.g. a call to the home for a domestic dispute) that prompted the officer to check and see if they were wanted. They then executed the warrant, which may have been issued years before it was executed. I think the FAA will employ a similar strategy; little to no effort will be made to "spot check" model aircraft, but they will certainly lay down penalties for failing to register the aircraft if there is some kind of incident.

Perhaps. Then again, the FAA could set the 200' limit for commercial drones that are flow beyond LOS, and keep the 400' recommendation for aircraft that are flown within LOS, and solely for hobby/recreational purposes.

I would rather have pay for one number for all of my aircraft, one time in my life, rather than having to pay for separate, unique "N" number every time build or buy a new aircraft.