The question of whether the conventional approaches of media effects research still prove valid in online environments has increasingly stimulated the interest of scholars. This article adds to this discussion, exploring whether Noelle-Neumann’s Theory of Public Opinion can explain public opinion formation when applied to computer-mediated communication environments. By focusing primarily on the perception of the climate of opinion, our theoretical considerations indicate that individuals most likely tend to select information online following a subjective–pluralistic pattern. Due to projection effects, this might lead to the perception of a consonant climate of opinion in one’s Internet environment, which in turn reduces the individual’s fear of isolation. However, there is no evidence yet that this affects the willingness to speak out in offline environments.