I looked at the list of sightings they published, and within a few entries (specifically entry #10) found one purporting to have sighted a drone at 19,200 feet.

I looked at the list of sightings they published, and within a few entries (specifically entry #10) found one purporting to have sighted a drone at 19,200 feet. (while the plane was at 19,500) This seems like an absurdly high altitude for even a commercial drone, let alone the stuff people are buying for personal use. Is it even possible for commercially available drones to fly at this altitude, or could these be false-positives?