Corrected entry: The whole blackmailing episode is based on Kenny watching illegal underage videos. But "they" recorded Kenny with his own webcam, so how would they know what kind of material he was watching? Sure, they can also record his screen using the virus on the notebook, but then they would have to compose both streamings in a single video, and that would be easily deniable. How do they want to prove he was actually watching that illegal stuff and not something which was added in editing?
Corrected entry: About halfway through the episode Yorkie is seen crossing the road and walking towards a cinema. As the camera pans out a big poster for the movie Scream can be seen on the side of the cinema. This episode is set in 1987, however, Scream wasn't released until 1996.