Trivia: Spoilers. You can briefly see at one point that Margot's high school mascot is an anthropomorphic catfish. In internet slang, "catfishing" is when someone pretends to be someone else online in order to "lure in" others. This is a very subtle clue to the ending, in which it is revealed that the user "fish_n_chips" was a boy who was "catfishing" Margot online.
Trivia: Even though (mostly) real web-sites are used for the majority of the film, in order to make them look "correct" on-screen and allow for subtle manipulation to build drama, the animators had to re-create the websites from scratch in their animation software and then animate everything individually, right down to the movements of the mouse-cursor.
Trivia: The film is produced by Russian filmmaker Timur Bekmambetov, whom also produced the similarly-made "Unfriended." As a nod, the name "Laura Barnes" (the girl who becomes the evil spirit in "Unfriended") appears very briefly near the beginning of the film under the "trending" words during the first Facebook scene.
