.. or a small war. https://yorksranter.wordpress.com/2007/07/27/ex-viktor-bout-...
People are definitely doing this, also codified in this paper: http://www.cs.ox.ac.uk/files/9919/eurosnp.pdf (Inferring Confidential Corporate Mergers and Government Relations from Air Traffic Communication)
Re:Flightradar24 – how it works
by themodelplumber on Sunday February 17, 2019 @03:13PM
(#19186564)
I've seen people doing this on Twitter. With yachts, too, IIRC.
Would be to specifially watch all the planes that fly in and out of a large notable event; such as the superbowl, or davos, g-20 summit etc - and see where all thise private jets come from to get to that event...