TSA as a Metaphor

after last Christmas (underwear bomber) the public was screaming for scanners

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Do you mean former Homeland Security secretary Michael Chertoff?  The same Michael Chertoff who now has a private security consulting firm and whose client manufactures the scanners?

Scanners wouldn't have caught the "underwear bomber", or any of the other attempted bombers; none of the flights they were on originated in the US and foreign airports don't have scanners.

Why would anybody defend these people, these devices or these methods?  

The scanners aren't safe, and TSA agents don't change latex gloves from search to search (the gloves are for their protection, not yours), risking the spread of lice, chiggers, bedbugs, and diseases like MRSA, sexually-t­ransmitted disease, cold viruses, skin fungi (such as ringworm), and even contribute to a pandemic outbreak.
Read the Article at HuffingtonPost