The article deals with the analysis of reliability and objectivity of information that can be found on the internet and the objectivity and reliability of such information is compared to the system’s behavior. The terms “useful” and “useless” information have been introduced. On the basis of Shannon’s law of connection between information and entropy, as the measure of system’s organization the notion of information chaos is analyzed, it illustrating growth of entropy in such system. The work comprises a graphical interpretation of various events with Lars Onsager’s curves. Described is the parameter which has to discern authentic useful information available for analyzing and obtaining new knowledge from false and biased. A variant of the general scheme of the dynamic information system of the Internet, reflecting the appearance of inaccurate information, is given. The analysis of experts’ evaluation of the internet users’ reaction on appearance of false, biased or unreliable information showed that young users were oriented largely on emotional content, while the scientific society preferred reliability, objectiveness and authenticity of information.