^ for coming to FlyerTalk - welcome! (and ^ for the passenger who referred you here.)

x 1000 for TSA at ATL. In addition to complaining directly to TSA and to your congressional representatives (which may not do any good, but it's another point on the graph), also contact the Federal Security Director (FSD) at ATL and the Ground Security Coordinator (GSC) for your airline at ATL. These may also not do any good but at some point if enough people speak up, they may start to take notice. Somebody here who knows ATL may be able to give you the names/addresses for the FSD and GSC.
Stick around (and see the rest of FlyerTalk, too.)