 In "United States v. Herzbrun" (1984), the U.S. Court of Appeals for the Eleventh Circuit found Herzbrun “had no constitutional right to revoke his consent to a search of his bag once it entered the X-ray machine and he walked through the magnetometer.” And in "United States v. Pulido-Baquerizo" (9th Cir.1986), the court explained that “[a] rule allowing a passenger to leave without a search after an inconclusive X-ray scan would encourage airline terrorism by providing a secure exit where detection was threatened.”

A similar argument is applied to searches of prison visitors, for example, in "United States v. Spriggs" (1993).As long as a prison visitor is warned that all visitors will be searched and consents to the search, consent cannot be revoked once the search has begun.