We might be laughing now, but this kind of things bring us new laws, limitations and regulations. Drones are a great tool, even in the hands of a total amateur. Some regulation is needed (eg. not flying over crowds of people), but otherwise a top-down view shows many, many interesting things, from far crash remains (missing people, atleast finding a body) to illegal dumping operations (eg. a company pouring toxic was…
Put transponders on all drones that must be registered. Then it's easy to track and ID anyone legally flying.
And anything large/long range without a transponder is illegally flying.