If there's anyone who knows about the darker side of online dating, it's Nev Schulman. The 29-year-old rose to fame after his documentary Catfish, about an online flirtation of his which turned sour, became a breakout hit. He followed it up with a series on MTV which followed similar stories of digital deception across America. Nev has become the go-to expert in online relationships for millennials, a generation who have never known a world without Facebook. His clout in this area springs from his own experience which led him to coin the term 'catfish', referring to someone who creates a...