True, the article is talking about Ireland, and I don't know what the current laws are there. But for the States, normal aircraft are supposed to stay 500 ft away: https://www.ecfr.gov/current/title-14/chapter-I/subchapter-F...

That's not true for helicopters and UAVs within sight of their controllers, but I feel sorry for the people who bought a house not near and airport, and now have to deal with a buzzing swarm overhead.