Los Angeles has the following law for parks: "No person shall land, release, take off or fly any balloon, except children toy balloons not inflated with any flammable material, helicopter, parakite, hang glider, aircraft or powered models thereof, except in areas specifically set aside therefor." http://www.laparks.org/venice/pdf/lamc63.pdf A compliant by the US Navy led to the seizure of a drone and citation under this law. It's important to note this operator attracted attention after he flew over a police parking lot and city attorneys advised police no laws were broken. http://www.latimes.com/local/lanow/la-me-ln-lapd-civilian-drone-hollywood-lot-20140801-story.html