If it is this easy to climb under a plane, I wonder why they waste every one's time with those "serious" security checks.
I'm more angry that hundreds of millions, or even billions of dollars are spent to train a workforce to identify tubes of toothpaste on a screen, but anyone at an airport that wants a knife can just order a steak from an airport restaurant.
It makes me sad that the public can tolerate such ignorance and waste.
Edit: US airports. Since this article was about a US airline operating in the United States I thought that went without saying.
The goal of airport security is to make you feel safe by knowing other people have to go through the same ordeal (ie, security theater). It is more akin to hazing rituals than actually security.