From the linked PDF:
"7
Errant drone flights are not unusual: In 2019, the FAA
alone received an average of six reports daily from people who
claimed to have witnessed unauthorized drone operations.
Proposed Rule, 84 Fed. Reg. at 72,455. The FAA has noted
the potential use of drones for illegal activities, including
“carrying and smuggling of controlled substances, illicit drugs,
and other dangerous or hazardous payloads; the unlawful
invasion of privacy; illegal surveillance and reconnaissance;
the weaponization of [drones]; sabotaging of critical
infrastructure; property theft; disruption; and harassment.” Id.
at 72,454. Extremists have increasingly sought to use drones
to carry out violent attacks: Terrorists killed several people by
detonating a bomb carried by a drone that flew above a military
parade in Yemen. Id. at 72,455 & n.34.2 The Islamic State and
other terrorist organizations have reportedly modified
commercially available drones so they can carry and release
munitions and explosives. Id. at 72,455 & n.31.3 A would-be
assassin used a drone to target then-President Nicolás Maduro
in Venezuela. Id. at 72,455 & n.32.4 And British intelligence
agencies uncovered a terrorist plan to fly drones into the
engines of commercial airplanes as they took off from airports
in the United Kingdom. Id. at 72,455 & n.33.5"
Don't you all feel so much better now, knowing that criminals and terrorists will have to register their drones?