I have zero understanding of the security business, (truth be told) I know what my brain says, but whether that translates into how the security business should operate, I have no idea.
Having said that, it would seem to my non-security business brain that pizza box advertisements recruiting any old "joe/jane" would not be sufficient to bring in the type of applicant that is needed to preform security duties, but I do not work in the security business and do not profess to understand the needs of it.
One of my professor's in Medical School once said that some of what we (Physician's) will do is See One, Do One, Teach One and to some degree that is true (obviously it is way more than ONE, but the saying does hold truth). There is lots of knowledge required, there is lots of training required, but much of what of I do is wrought process and while you could not substitute any old person to do my job, some parts could be done by almost anybody if they receive the proper training.
To be very clear, I am not excusing TSA by any means, especially as to my brain I would not think that any old person is fit to the job, but maybe in TSA HQ's mind if there is a wrought process, than as long as the person is capable of performing the process, they can be TRAINED to do it.
I know that the Paramedic I am friendly with who moonlights as a TSA Employee Part-Time says that much focus is on training on HOW to do something, not WHY they do something.
Hence maybe TSA HQ's theory is if we have a process, than it can be trained to be performed by any old "joe/jane" and thus advertising for part-time employee on a pizza box makes sense as it has a wide audience? Again, it is not excuse and I said a few times I would think that security would require a specific type of applicant and not just any old person.
I realize I have gotten way off-topic here, but just thinking out loud.