[enigma20]

When I',m flying to UK I always wonder if there are so many first timers, or people are so ignorant.

In Germany I never seen so many people have to open the bags after the scan, and have them re-scanned.

[JshWright]

This is the reason I opt to pay for TSA PreCheck (in the US, obviously). Not because it saves hassle (though it certainly does that), but because it pretty effectively filters out first timers.

[lesuorac]

Well not Germany, but the average American flies ~1/yr so yes the terminal is full of first time fliers effectively.