Features are disclosed for a security camera including automated identification of disabled privacy indicators based on feedback included in monitored data (e.g., images). The features include generating a random number and adjusting light emitted by the privacy indicator to signal the random number. The camera may detect subtle changes (e.g., brightness, color, hue, intensity) in the image, a sequence of images, or portions thereof that can be decoded and compared to the random number. If there is a discrepancy between the random number and decoded value, an indication of tampering with the privacy indicator may be provided.