Flight following websites and Twitter accounts offer real-time views of air traffic –- and sometimes major news like Nancy Pelosi's Taiwan trip –- but that exposure draws pushback ranging from complaints to gear seizures.

Whether Russian air freight firms, Saudi Arabian plane owners or others, Dan Streufert said his group gets dozens of "requests" each year to stop posting aircrafts' whereabouts.

"We have not removed anything so far. This is all public information. And I don't want to be the arbiter of who's right and who's wrong," added Streufert, founder of the US-based flight tracking site ADS-B Exchange.

Limits do apply in some cases, but groups that piece together the flight paths note that the core information source is legally available and open to anyone with the right gear.