Controversial religious groups are a phenomenon accompanying the man for a long time. Fascinate, captivate, reflect, inspire. Despite the existence of several works on the unique issues and research related to it constantly raises questions and concerns that are difficult to dispel, for which there is no clear and simple answers. This publication is the result of the author’s thoughts, her personal perspective on this interesting part of social reality. Attention was focused on a few issues which seem to be leading. Firstly, on the possibility of mutual replacing dates sect - controversial religious group. Secondly, on classifying phenomena which are taking place on rich, religious stage. Thirdly, on effects of the stay in groups stirring up controversy, including the use of their unethical practices - the brainwashing and the mind control. The last, fourth dilemma is correlating with the accessibility to forms of this type, rather hermetic of the community and the attitude presented towards them by the researcher which ultimately affect the test result. The article doesn’t exhaust the issues and indeed it can be treated, for the invitation to dialogue, exchanges of the opinions, effects that are essential to the development of science.