Which of the following actions is NOT a common surveillance method?

The action that is NOT a common surveillance method is the violation of privacy laws. Surveillance is typically governed by laws that protect individuals' privacy rights. Legal surveillance methods involve monitoring a subject's public behavior without infringing upon their legal rights. Following a suspect, hiding in plain sight, and documenting observed behavior are standard techniques used by investigators to gather information legally and ethically. These methods allow investigators to collect evidence while respecting the boundaries set by law. Engaging in activities that violate privacy laws undermines the legitimacy of the investigation and can lead to legal repercussions for the investigator. This highlights the importance of ethical conduct in investigative practices.