You mean outsourcing like the Trojan writers are doing?

Stick a different 2D barcode on each car, mount a camera in a location that can see the barcode at the finish line. When the car crosses the finish line, take a picture and search for the barcode.

Imdb says that Children of Men's release date was the 22nd of September in the UK, the USA was one of the last places to get the movie released.
It apparently took the pirates around 6 weeks to release a torrent.