IMO, one should not expect too much when it comes to airport security. Even before the TSA, I had problems even with connecting flights.
I remember when some genius at one of the Chicago airports posted acceptable carryon size and then put a cookie cutter template on the xray machine. My carryon was half the size allowed, but because it was not a briefcase style (semi soft gym locker style bag) it wouldn't fit through the template. I had to empty everything out and mail the contents to myself (fragile items I didn't want in checked luggage).
Another time, I got accosted for trying to bring an empty semi soft leather pool stick case on the plane (wouldn't fit in my checked luggage; pool stick was already in checked luggage), and then they took swabs of the inside of my shoes. My friend, taking a separate flight, walked in with what looked like a small base ball bat (it was carved so they called it a statue) without a second glance.
Another funny story I witnessed from earlier this year... While waiting for a connecting flight to another country, three young fellows bought a $500 bottle of liquor from the duty free shop to celebrate when they got to their final destination. 5 minutes before boarding they were told they couldn't bring alcohol onto the flight, and they ended up leaving the $500 bottle on a seat at the gate.