Back in 2004, NBC’s 'To Catch a Predator' captivated millions of viewers as it followed a vigilante group called Perverted Justice, which has a goal to thwart pedophiles searching the internet for minors. Adult volunteers go online to pose as minors in order to, well, catch predators. Three years later, amid its growing popularity, it came to an end. But nearly two decades later, it's inspired a genre of influencers who have tried to fill the void.