Two little tales.. An ex-colleague of mine worked in Africa. He was on duty one day when the local "law" arrived, took the tower controller by the neck and shot him on the spot. I presume it was something more serious than double-parking.
Where I worked a revolution took place one night. The ATCOs on watch were not aware of any problems until the local army arrived in the tower and told the staff to get out. The Supervisor told them to leave at once as his ATCOs were staying put. Quick gabble on a walkie-talkie and a tank trundled across the airfield and stuck it's gun up against the tower window. They all left!