Motor Trend reports on shenanigans after Hertz employees at the Syracuse, NY airport left early one afternoon... https://www.motortrend.com/news/hertz-car-rental-new-york-empty-desk/ [motortrend.com]
About 20 customers hunted around for keys, or cars with keys already in them, and drove off. Later some customers were phoned and asked to bring that car back and swap for the car that they had reserved.