Yes, opt out – opt out of the AIT scanners AND the unwarranted physical frisking. Opting out of a virtual strip search does not warrant the physical, tactile search, so both are in violation of the Fourth Amendment to the U.S. Constitution. And no need to go to Wikipedia – it’s right here:
The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.
[Relevant portions emphasized -ed.]