They are replacing some of them with the milimeter wave scanners, that uses software to identify "problem areas" via color coding on a human silhouette.
I got flagged by one of those leaving lolCleveland recently.
The lady actually patted my head down because there was a yellow alert on the top of my head.
No, I was not wearing a hat nor did I have a beehive do goin on up there.
Just my regular flat hair, where even a bobby pin couldn't be smuggled in.