Avgas is much appreciated among people doing motorcycle cross country racing, all kind of racing with vintage cars etc.
They do things “properly” in Australia:
342 offences!
We have had someone here on EuroGA report sand in his PA46 fuel tanks in Turkey, but this is something else…
I’ve had stones placed inside my turbine engines neatly hidden behind the turbine blades. I think that was in Yerevan, but it was somewhere like that; and it was fairly obvious who the perps were, as the little brats were sitting on the wall that was supposed to provide some security, presumably waiting to see the fun when a pilot fails to do a thorough pre-flight.