Antonyms for the term "blows the whistle on" include keeping quiet, concealing information, and covering up. These antonyms imply a lack of transparency and honesty in handling sensitive information. In some situations, keeping quiet or concealing information may be justified, such as in matters of national security or personal privacy. However, covering up unethical or illegal behavior can have serious consequences and may lead to legal repercussions. It is important to find a balance between protecting confidentiality and ensuring accountability, especially in situations where public safety or trust is at stake.