If you really want to get into network forensics, at least the people networks at FBI-types deal with, crawl IMDB and look for groups that never or rarely work together. In a TopGear interview Matt Damon (Borne franchise) was asked whether he ever talked to Tom Cruise (Mission Impossible franchise). His answer: "we go to different churches." He didn't mean standard religion. There are some groups who actively avoid each other. But look for links between the recent Batman and Mission Impossible franchises and you;ll see what I mean.