The point of John Oliver's crass humor was not to attempt to convince us that it's a good idea to frame "the problem" in terms of junks; John Oliver is a master satirist. The best motivation I can think of for this surveillance piece, was to try and make this piece so absurd as to ensue hilarity, and make it appealing to both those interested in the topic of surveillance and those who aren't. It's a brilliant technique to spread a message, it keeps those who weren't interested in surveillance interested enough to remember Oliver's piece several days later. The real message to the budding interested, because why interview the FBI's Most Wanted Man and not care enough to point his target audience in the right direction, and all those who are behind the message aren't stupid, was to watch CITIZENFOUR.