I'm wondering if taking the time to file a complaint form every time you are patted down will have more of an effect than requesting a private screening.

It might even equally delay the line if that is the goal.

Based on this recent thread:
http://www.flyertalk.com/forum/showthread.php?t=377194
demanding to see a LEO and filing a police report if you feel you were inappropriately touched may also be very effective. And very confusing to the TSA who (at least in this case) seemed unable to comprehend that the pax might want to see a LEO.

I worry that all a private screening does is make it so that the rest of the public doesn't see what the TSA is doing.