A couple weeks after 9/11 a person I know went on a trip, and while waiting in line for security had to find a bathroom. Went through a side door that was open, down a hall way, and ended up on the other side of security.
Anyways. Lots of holes in airport security for sure, but honestly, I don't care. I am more likely to get shot on the street than I am to become a victim of a hijacking.