Go directly to the Screening Manager in cases such as these. It's not worth talking to the people at the WTMD or the wand wizards. Get their names and go right to the SM. Also, phone in a complaint to the toll-free TSA hotline 866-289-9673. Give the agents' names to all parties concerned, as well as your general dissatisfaction with the screening practices employed by that airport.
The more people who speak up, the more likely it is we will get this harassment to stop.
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"Give me Liberty or give me Death." - Patrick Henry