When I worked on a Hawk flight line in a Middle Eastern country, we had to go out to the local souk and buy a couple of dozen padlocks, so that we could lock the canopy operating handles at the end of each days flying. This followed a series of incidents where cockpit switches had been tampered with, somtimes running batteries flat.
The culprits would either have been bored aircraft guards having a play around, or the Arab air force 'QA' personnel, having another attempt at making the 'white eyes' appear incompetent.