UPDATE, 11/25/'10: The much ballyhooed protests predicted in the media for Wednesday, November 24th at airports around the nation failed to materialize. While air travel was up 11% from last year on the same day before Thanksgiving, the actual numbers of protesters of the TSA policy were minute, tiny, nearly non-existent at less than 1%. The response to that disastisfaction should be proportional, not over-responsive; and it should be constructive, not reactive or appeasing.
A few figures noting scanner opt-outs possibly in protest (although not specifically), in no particular order, listing available data:
Boston: 300 out of 56,000
Los Angeles: 113 out of 50,000
Detroit: 57 out of 25,000
Atlanta: 39, out of 47,000 air travelers
Charlotte: 1, out of 18,000
Cincinnati: 15
St. Louis: 7
New Orleans: 6
Memphis: 5
Dallas/Fort Worth: 1