Published: Nov 24, 2010 5:41 AM EST
Updated: Nov 24, 2010 2:41 AM EST

Millions of travelers will pass through strict security checkpoints. As we've been telling you, they involve invasive full-body scans and pat downs. While many passengers are speaking out against the measures, others think more needs to be done.

Wednesday has been dubbed National Opt-Out Day. Participants plan to refuse the full body scan in protest. But some who have worked in airport security for years, say, that type of behavior is detrimental to Americans' safety

"They only have to succeed one time," Gate Agent Mike Touhey said. "We have to be correct 100% of the time."

After stopping the so-called "underwear bomber" last Christmas, TSA installed full-body screeners. The agency is now trying to balance terror threats against the clamor over security scans, pats downs and the battle cry, "don't touch my junk."

Just last week, a CBS news poll showed 81% of Americans favored full-body screeners.

But this week, in another poll: only 64% support them. And half oppose pat downs.

"They're whining. I'm sorry," Touhey said. "What's more important to you? Your junk? Or your safety?"

Still, some airport safety experts believe scans and pat downs are not enough.     

"You must be proactive and not reactive,"  Isaac Ysef said.

Ysef is the former security chief of Israel's El AL,  the airline with the world's toughest security. Ysef said the TSA's approach is fundamentally wrong. It's too reliant on technology and luck.

"Interview people. Check passports. Ask questions. It's not complicated," Ysef said.

Congressman Connie Mack Tuesday called the enhanced pat downs "an invasion of Americans' privacy rights, and called on TSA to cease them immediately so congress can review airport screening policies.