Is it possible to identify and shame litterbugs through the DNA traces they leave behind? A campaign from Ogilvy & Mather promotes the upcoming 15th anniversary of Hong Kong Cleanup by plastering posters around the city with images of the perpetrators created using demographic profiling and DNA phenotyping. Science fiction? Reston, VA's Parabon NanoLabs, which makes the Snapshot technology, claims it can accurately reveal face shape as well as eye, hair and skin color—but will only demonstrate it for you if you work in law enforcement.