The user-interface (UI) of interactive systems is the meeting point of people with interactive communication technology (ICT). As a human product, it forms a part of culture that determines us, often without our full awareness. The values and goals of the designers are implicitly encoded in the interface and the documentation but can be in conflict with the values of the user. This is when both the intentional and unintentional manipulation with the user starts because he or she is presented with inappropriate choices or even inappropriate goals. The aim of this article is to show how this manipulation works, in which regards it is unavoidable and how can we deal with it. Ideologies are a special means of manipulation and we can counter them by suitable education and analysis.