Recollect calibrating the ILS at an RAFG station.
On one of our runs we noted that a group of picnickers had ensconced themselves by the perimeter right under the approach.
For the next approach someone filled a washbasin and, on cue, pulled the plug.
The picnickers clearly put two and two together and got a #1 because, on the next run, they were gone.
What rotters bored RAF crew can be
Okay I'll play devil's advocate.
Bit confused, were the picnickers in the boundary fence or outside?
I am assuming outside, in which case what right did you have to do what you did? If inside I would suggest you had a bigger problem than a few sandwich munchers sat at the end of a runway.
Still bags of fun, High Jinks from the rotters I suppose?
Edited to add: You had a washbasin on the aircraft? WTF were you flying?
Or have I completely missed something?