Which of the following does NOT fall under serious criminal misconduct?

Serious criminal misconduct encompasses actions that significantly contravene legal and ethical standards, often involving the integrity of legal proceedings or endangering individuals' rights and safety. When evaluating the options provided, minor conduct violations are fundamentally different from serious criminal misconduct. They typically involve less severe infractions, often governed by internal regulations or policies rather than criminal law, and do not pose a direct threat to public safety or the judicial process.

In contrast, the other options—intimidation of witnesses, destruction of evidence, and obstruction of justice—directly interfere with the legal system's ability to function properly. They are all serious offenses that can undermine justice, as they involve intimidation, tampering, or hindering law enforcement investigations and proceedings. Each of these actions carries significant legal implications and is considered a serious breach of conduct. Therefore, minor conduct violations are the only option that does not align with the definition of serious criminal misconduct.