I recall the ATC being played on the PA at the Sywell airshow a few years ago. A C130 made a low pass over the field and must have failed to spot the grass runway (in the days before the concrete strip). The C130 passed over the car park, setting off a cacophany of alarms, and then gave us a wonderful closeup view as it passed over the crowd. The frantic calls from the controller were certainly interesting. I thought at the time that it was all part of the display but surely it must have been a genuine error?

Sam,

Read the sticky in the ATC forum, on my phone now so difficult to link to it.

I think the assumption is that, if a frequency is ‘publicised’, as at an airshow etc, then it is ok....