The spread of false, misleading, or manipulated information is one of the most complex and dangerous challenges of the digital age, with significant repercussions on social, political, and cultural balance. The phenomena known as misinformation, disinformation, malinformation, and hate speech—collectively summarized under the acronym MDHM—represent distinct yet closely interconnected manifestations of this issue. A thorough understanding of their specificities is essential for developing effective strategies to contain and counter the threats these phenomena pose to social cohesion and institutional stability.