According to Joint Public Safety Bulletin document recently leaked from California State Threat Assessment Center unauthorized drone flying in restricted areas are on the rise and has impacted and impeded emergency, firefighting, and commercial air operations.Between October 2015 and September 2016 California had 358 of the approximate 1744 reported dangerous encounters nationwide.

Most of the incidents are reckless flights by quadcopters pilots. The document includes a case when a law enforcement helicopter along the southern coast of California had a nearmiss encounter with a Phantom DJI drone. Another incidents reported passenger jets at Los Angeles International Airport coming within 200 feet of unmanned ircraft while on approach for landing.