> [A peep hole] is [a disruptive product] if you're a door-to-door salesperson

Geoff Moore's theories apply to disruptive or discontinuous products that force customers to make a significant change in behavior. A peep hole may force door-to-door salespeople to make significant changes in behavior, but the customer doesn't make a significant change in behavior. The "disruption" or "discontinuity" refers to the changes in behavior of the consumer.