01
Factual background & dispute
- Interactive digital doors in metro stations used cameras and sensors to analyze passenger reactions to advertisements.
- The system inferred information including age, gender, attention span, and emotional state.
- Passengers received no clear notice and were given no genuine choice regarding their participation.
02
Core issues & judicial focus
- Whether facial detection and emotion analysis constitute personal data processing
- Whether subsequent anonymization cures legal deficiencies at the initial collection stage
- Whether public service operators may collect passenger data on a compulsory basis for commercial advertising revenue
03
Judicial finding & holding
- The court upheld the order prohibiting the collection and processing of personal data, including images, without prior consent.
- The court held that the commercial data processing infringed upon passenger personality and consumer rights.
- The appellate court increased collective moral damages to BRL 500,000.
04
Practical risk implications
01Emotion recognition and advertising analytics in public venues require rigorous review of necessity and legal basis.
02When anonymization occurs after data capture, operators must still evaluate the lawfulness of the initial collection.
03Public service providers should restrict the commercialization of personal data unrelated to core public services.