Which of the following are reasons the board may take action against a license?

The board may take action against a license when there is evidence of unethical practices, such as the receipt of a fee to cure a disease. This behavior is considered not only unprofessional but also poses risks to public health and safety. In the field of cosmetology, practitioners are expected to adhere to strict guidelines and ethical standards, which prohibit them from making medical claims or suggesting that they can treat or cure diseases. Engaging in such practices undermines the integrity of the profession and could lead to disciplinary action.

In contrast, the other choices do not inherently relate to violations of regulations or ethical standards. Tagging regulations are generally associated with labeling and compliance issues rather than professional misconduct. Maintaining an increased social media presence or receiving positive customer reviews, while potentially affecting a business's reputation, are not grounds for disciplinary action unless they accompany unethical behavior. Thus, only the practice of accepting fees for curing diseases directly violates laws and ethics within the cosmetology industry.