Frank Booth doesn't surveil Dorothy for information—he surveils her to keep her compliant, to maintain a state of perpetual exposure where she cannot think beyond his gaze.

The tape—the physical evidence of her son—functions as algorithmic infrastructure: it creates a behavior loop where Dorothy performs docility to prevent escalation, checking herself constantly, self-editing, existing in anticipatory dread of what Frank will reveal next.

This is not 1980s deviance—this is the engagement economy operating on pure mechanics: generate shame, extract compliance, monetize vulnerability.

Lynch's error was architectural. He placed Frank in a basement, singular and pathological, when the film's own logic suggests something distributed—notice that Frank doesn't work alone, as Jeffrey becomes the inadvertent collaborator who watches the apartment with equal fascination, equally aroused by the transgression. The film treats Jeffrey's voyeurism as innocent curiosity corrupted by proximity to Frank's violence, but the mechanism is identical: both men are addicted to the loop of seeing what they shouldn't, with the only difference being social permission. When Frank discovers Jeffrey has been watching, his response isn't to stop—it's to conscript him, bringing Jeffrey deeper and making him complicit, so the violence escalates not because Frank is mad but because the system requires new content, new witnesses, new participants to maintain intensity, turning Dorothy into not a person but a node in a network where visibility equals vulnerability.

The real horror isn't the sadist. It's the architecture that makes sadism scalable, profitable, and fundamentally democratic.

That's the prescience Lynch missed: the real horror isn't the sadist—it's the architecture that makes sadism scalable, profitable, and fundamentally democratic, where anyone can build it and everyone becomes Frank.