SFist has a late breaking story today about a secret cabal of people who just might be trying to ruin our city. Who are these people? We don't know. We do know that they walk amongst us and hide their true identities. Some of these people you might see at Safeway. Some of these people you might see walking down the street. Some of these people might EVEN BE WORKING WITH YOU! Be afraid, be very afraid. Who are these people? Posters on SFWall.net ...