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Which of the following are valid surveillance techniques?

  1. Observing the physical environment and using situational awareness

  2. Using parabolic microphones to listen in on private conversations

  3. Using telescopes to peek into windows of residences

  4. Purposely following a vehicle closely to intimidate the subject who is a criminal

The correct answer is: Observing the physical environment and using situational awareness

The choice that highlights observing the physical environment and utilizing situational awareness is indeed a valid surveillance technique. This approach focuses on understanding the surrounding context and situations to assess potential risks or monitor activities effectively. It involves being aware of one’s environment, noticing deviations from the norm, and sustaining attentiveness to human behavior and physical surroundings. This technique emphasizes the importance of awareness rather than intrusive methods, aligning with best practices in security and safety. The other options suggest methods that could infringe on privacy rights or rely on unethical practices. Techniques like using parabolic microphones or telescopes indicate a violation of personal privacy. Such methods can lead to legal consequences and ethical dilemmas. Following a vehicle closely can also be viewed as aggressive or intimidating behavior, which not only raises ethical concerns but could also escalate situations unnecessarily. Thus, option A remains the most responsible and legitimate practice in the context of surveillance.