Many will be given as Christmas gifts. Chaos in the air?
Air will be fine, as 99.9999% of these won’t be operated anywhere that could be remotely construed as a manned aircraft flight path.
Chaos on the ground will be from ignorant arguments over whether it need be registered, and how that registration requirement will be grossly abused (ex.: you record police violating a law, and they slam you with a $250,000 fine for using an unregistered drone for the recording).