I travel frequently and have never had issues with the employees, I do however think the policies are ridiculous.
The best things that have been done since 9-11 are the locks on the cabin doors and thorough screening of all checked bags. All the additional stuff, like no nail trimmers, no liquids, etc. seem to be measures enacted to give the appearance of increased safety without any real reasoning.
The TSA needs to be forthright and honest about there reasoning. If people can make a bomb with liquids that can do more damage than my laptop battery them by all means let's ban liquids otherwise forget it. If we're going to ban knives and scissors then we ought to be banning 10 inch titanium knitting needles.
For me it is the seeming capricious nature of the policies that make them so galling.