I agree wholeheartedly- and my TSA example:

Last year I inadvertantly got a K-Bar through security in Savannah, GA. It was a gift to me from the USMC that day and I just forgot I had put it in my bag (which was a carry on).

When I realized it I said there's no way I'm going to back there and tell them- I'd probably have been detained for hours, missed my flight and my best nail scissors could have been confiscated too.

For those of you who may not know a K-Bar is a large knife (a little less than a foot long) designed to kill people.