That isn't exactly a hack.
They just bought a transmitter, and transmitted their song on ATC frequency.....big deal.
It's the same thing as when you buy one of those small car adapter thingies which connect to your phone and then you can use the car's radio to listen to your phone's audio.
Pakistani LEAs should catch these people and put them in prison.
Also, just for info, an Indian sitting in Amritsar can do the same with Pakistani (Lahore) ATC communications.
