I flew PHL to PIT this past weekend and something occured to me. As I was waiting in the fairly long security line at PHL, I noticed that very few people were openly carrying the ziploc bags for small containers of liquids and gels. I also noticed that quite a few people had carry-on bags that were huge and bulging. These big bags sailed through security with no problem. I had a lot of trouble believing that not one of these huge bags contained any prohibited items. On another recent trip from the west coast I forgot to remove my ziploc bag and a large bottle from my briefcase. Security had no problem with this. I really wonder if security is as thorough as we are led to believe.