The new system involved an employee-activated device that sprays a fine, barely visible mist laced with synthetic DNA to cover anyone in its path, including criminals, and simultaneously alerts the police to a crime in progress.
The mist — visible only under ultraviolet light — carries DNA markers particular to the location, enabling the police to match the burglar with the place burgled. Now, a sign on the front door of the McDonald’s prominently warns potential thieves of the spray’s presence: “You Steal, You’re Marked.”
Link via Ace of Spades HQ | Photo (unrelated) via Flickr user Leonid Mamchenkov used under Creative Commons license
Moral of the story? They can't make anything that someone can't hack.