[nazgul17]

I know it's being used to decide where to place random controls in LA airport, day to day. If the controls were in the same locations, the bad guys would just avoid them, but you don't want the completely random either because some areas have higher throughput, or something like that. Lookup Milind Tambe for more details. They also augmented the technology with psychology considerations. Check if there is a video of a presentation from Tambe on the subject: it's fascinating!