There were plenty of people prepared to opt-out, they just never got a chance because it seems TSA turned a lot of the scanners off:
Gizmodo, the Gadget Guide
To anyone paying attention, this is a tacit admission that it is all security theatre and doesn't make us substantially safer. To the majority of the public, it's a great way to manipulate the headlines to make it seem like people aren't that upset after all.
