The same brainless metality that has happened with morans near Luton airport. They had a hand held 2 way airband radio.(the sort PPL pilots use as a back up radio) They was transmiting bogus ATC instructions to inbound airliners, and at other times swearing and abusing the pilots.

Its as bad as those D********* who shine lazers in the eyes of aircraft at night. If they were on a holiday to Benedorm or somewhere and the plane had to make an emergicy landing of one of these events, they would be the first to claim compensation or something.