If I Fly a UAV Over My Neighbor's House, Is It Trespassing?

Fri Oct 12 04:02:08 PDT 2012

http://www.theatlantic.com/technology/archive/2012/10/if-i-fly-a-uav-over-my-neighbors-house-is-it-trespassing/263431/

By Alexis C. Madrigal

Tweet Oct 10 2012, 2:00 PM ET

Even a toy drone with an HD camera scrambles our sense of property and
privacy rights.

dronefence.jpg

The AR.Drone.2.0 in action in my backyard.

My poor kitten, who my unfortunate Instagram contacts know too well, gets
beat up every time he goes outside. There's a bully cat in the neighborhood
who appears to relish in attacking cute, fluffy things as soon as they get
out of human oversight. So, naturally, I bought a Parrot AR.Drone.2.0, a
remote-controlled quadcopter with an HD camera attached, to see if I could
spot where the punk bully cat hangs out.

After some training runs in which I crashed the little UAV every fifteen
seconds, I started to get the hang of where to push on my iPad to get the
little AR.Drone to go the way I desired. And then, dodging trees and power
lines, I sent the machine flying higher in the sky and scooted towards the
fence, popped over it, and -- terrified of crashing in territory I didn't
control -- sped back across to the safety of my own backyard, and engaged the
automatic landing sequence. 

Technically, I'd gone over the fence line, and if I'd done so on foot,
intentionally, I would have nominally been guilty of trespassing. But if I
were flying in a helicopter, a few hundred feet up, I would *not* have been
guilty of trespassing. So, what about the air in between? 

There aren't many specific laws or cases on the books to address my specific
situation, but we do know that the idea of airspace has changed in the
decades since humans started flying around. 

"Once upon a time, you had the rights to your property under the soil and to
the sky.  It went by the colorful, Latin label "ad coelum et ad inferos"---to
the heavens and hell," Ryan Calo, a University of Washington law professor
and former research director of Stanford's Center for Internet and Society,
told me. "But subsequent case law recognized the limits imposed by commercial
aviation and other realities of the modern world.  Now you own the air and
soil rights you might reasonably use and enjoy."

That original dictum -- ad coelum et ad inferos -- was never part of
legislation, but rather passed to us from British common law. The process by
which this notion of property was limited really began in the early twentieth
century, when we began to regularly reach into the heavens and nominally
closer to hell. Timothy Ravich is an aviation lawyer who contributed an
article to the North Dakota Law Review (UND is a major hub of civilian
aerospace training) on "the integration of unmanned aerial vehicles into the
national airspace." I figured if anyone knew the legal status of my
neighborhood flights, it would be him. 

"If you were to take your Parrot drone over my house, I suppose at one level,
it is a trespass," he said. "You were not invited there and could potentially
have disrupted my quiet enjoyment of my home. I suppose I could sue."

Whoops, I thought. But it's not really that simple. Regardless of whether
someone technically had the right to stop me from flying my little UAV over a
house, "It's quite another thing to exercise those rights in a court of law,"
Ravitch said. "If someone does take a Parrot and fly it over your house every
day for a year. Are you injured? What are the actual damages?"

In other words: what are you gonna do about it?

"What [property] rights you have beyond what you can physically touch has
always been difficult for the law to grapple with," Ravich told me. 

"Good fences make good neighbors," Ravitch said. "But we don't build fences
in the air."

droneview.jpg

The drone's eye view, sadly no Bully Cat in sight.

There are two fascinating analogous cases to look at. The first reaches all
the way back to the early 1800s, when balloonists (!) were first making their
uncertain journeys skyward. In 1822, the Supreme Court of New York heard the
case of Guille vs. Swan. Guille was a balloonist. Swan had a vegetable
garden. Guille launched himself in a balloon near Swan's patch and as he
descended, hilarity/mayhem ensued. Here's the court's description of the
situation:

    The facts were that Guille ascended in a balloon in the vicinity of
Swan's garden and descended into his garden. When he descended his body was
hanging out of the car of the balloon in a very perilous situation and he
called to a person at work in Swan's field to help him in a voice audible to
the pursuing crowd. After the balloon descended it dragged along over
potatoes and radishes about thirty feet when Guille was taken out. The
balloon was carried to a barn at the further end of the premises. When the
balloon descended more than two hundred persons broke into Swan's garden
through the fences and came on his premises beating down his vegetables and
flowers. 

Guille was found liable both for the damage his own balloon caused and the
damage perpetrated by the crowd following him. But in that case, the problem
was not the flight over Swan's veggies, but its descent back down where
property rights make more sense. 

The real touch point for UAV law in civilian air space, though, is the case
of United States v. Causby, which the Supreme Court heard in 1946. It
demolished, "ad coelum et ad inferos." The Thomas and Tinie Causby owned a
few acres of land near Greensboro, North Carolina on which they farmed
chickens. It happened to be underneath one of the glide paths to a municipal
airport, so planes passed roughly 83 feet above his property. The planes --
old-school bombers and fighters in many cases -- scared the wits out of his
chickens. They literally killed themselves flying off the walls in fright.
"As many as six to ten of their chickens were killed in one day by flying
into the walls from fright. The total chickens lost in that manner was about
150," the Court noted. Production also fell off. The result was the
destruction of the use of the property as a commercial chicken farm."

What resulted from this set of circumstances, though, was a triumph for
aviators. The Court affirmed that "the air above the minimum safe altitude of
flight... is a public highway and part of the public domain." Poor Causby and
his chickens were out of luck. 

    [The] doctrine [of cujus est solum ejus est usque ad coelum] has no place
in the modern world.  The air is a public highway, as Congress has declared.
Were that not true, every transcontinental flight would subject the operator
to countless trespass suits.  Common sense revolts at the idea.  To recognize
such private claims to the airspace would clog these highways, seriously
interfere with their control and development in the public interest, and
transfer into private ownership that to which only the public has a just
claim.

The question remains: what do private citizens and the public have just
claims to? The reasoning of the court in these old decisions is one that I
like: the air should be a space for everyone, not whoever can purchase the
most square acreage on the ground.

But the wide availability of UAV technology (combined with HD video)
scrambles my sense of what is right. Specifically, it points out how much of
our sense of privacy is intimately connected up with our expectations of our
property rights. Drones -- as flying, seeing objects -- scramble our 2D sense
of property boundaries, and along the way, make privacy much more
complicated.

"This idea of a reasonable expectation of privacy has always been accepted as
the standard and the interface of that privacy right and emerging UAV
technology is fascinating," Ravitch said. "There is not an answer. The best
we can do is arrive at laws and practices of the then-existing sensibilities
of the population."

Because while my hunt for the neighborhood's bully cat is a lighthearted
endeavor, the real difficult decisions in this domain will come when local
police have as many unmanned aerial systems as they do trained dogs.