Clandestine laboratories are illegal facilities where individuals produce cheap drugs using minimal equipment, often lacking scientific knowledge, though increasingly involving educated chemists. They are typically classified into economic-based 'super labs' for large-scale production and addiction-based 'user labs' for personal use, posing significant risks of fire, health hazards, and environmental contamination. Detection involves identifying signs such as unusual odors and security measures, and the dangers emphasize the need for cautious investigation and response protocols.