News reports on Thursday declared the National Opt-Out Day protest against TSA screening procedures a bust, noting short wait times at airport security screening and TSA reports that there wasn't any spike in passengers opting out of body scanners.

But reports from travelers and local news sources suggest that at some of the busiest airports in the US the TSA has backed down and resorted to using the old screening procedures -- metal detectors and less-intrusive pat-downs.

And anecdotal reports from airports across the country suggest lighter-than-expected passenger traffic, suggesting that some travelers may have decided to "opt out" of the screening procedures by not flying at all.