I recently flew from S. Korea to SFO where I had to pass through security again to make my connection to my domestic flight. Unknown to me, my wife had put a small, sealed, container of orange juice in my son's backpack (it was left over from the breakfast they served on the international flight). I had also forgotten that I removed my travel-sized hand-sanitizer from the 1 quart ZipLock bag to my laptop case.
I found both of these items after going through the "security" checkpoint.
The wife of a colleage and friend of mine flew from SeaTac to Maine with a six inch knife in her purse. She has the knife for self defense but forgot to remove it prior to flying.
Within a few years the TSA will likely become unionized, thanks to the democrats, and probably no more effective than the minimum wage earners and illegal aliens that were staffing the checkpoints prior to 9/11. However, grandmas and children as well as the rest of us will have to remove our shoes and anything else they dream up.
Half the time I forget to pull my quart bag out of my briefcase. If the TSA guys see it on the scanner they never say anything. I think they aren't really even looking. They probably only perk up if a Muslim-looking character comes through the line...which makes sense, from their perspective. They know better than anyone how stupid the "treat all passengers like criminals" poicy is.