There are numerous synonyms for the phrase "shameless misuse" that one can use, depending on the context, the tone or the intention behind its usage. For instance, "abuse," "misapplication" or "maltreatment" convey the idea of a careless or reckless use of something that could lead to harm or damage. Other possibilities are "misappropriation," which suggests intentional theft or embezzlement, or "violation," which implies a breach of a rule or a law. Depending on the severity of the misuse, "desecration," "defilement," or "profanation" could be used to describe a disrespectful or sacrilegious treatment of something sacred or important.