Most likely, the latest craze of quadcopters is the source of the reported drone sightings. Although many less-expensive models are available, the specs of a unit advertised at $3,399 lists a service ceiling of 14,700 feet. (Check out store.dji.com.) Imagine the danger if you eliminate lights, a transponder and, because of a small reflective radar size, the ability of ATC to even receive a primary target return on its scope. I shudder at the thought.