I've flown at least once a month for 10 years, domestically and internationally, and almost never have a negative experience with TSA personel. While I hate taking off my shoes, turning off my phone, and find the liquid rules particularly ridiculous, I have found that TSA agents have more than met my expectations of professionalism in implementing policies over which they have no control.
Millions of people travel every day. A few bad encounters can be expected. Don't be an asshole and tear down the employees of the TSA because of a few anecdotal occurrences. In doing so, you are just as bad as an ignorant talking head on Fox News. Think and put yourself in others shoes before you rant.