I live near a railyard, and when playing around with a scanner, I was amazed by how much of their communication is over open voice bands. You could easily buy

I live near a railyard, and when playing around with a scanner, I was amazed by how much of their communication is over open voice bands. You could easily buy an off-the-shelf transmitter and make your own unauthorized radio calls. The same goes for air traffic controllers, and it's happened before: https://www.abc.net.au/news/2017-09-05/melbourne-airport-hoax-caller-paul-sant-pleads-guilty/8873984 https://www.abc.net.au/news/2017-09-05/melbourne-airport-hoa...